Yeah it makes sense to wait.
Here is my method for converting CS:GO sensitivity to PUBG, and it should work for other Source games. Where it gets interesting is that I preserve the behavior of the scoped mouse sensitivity from CS:GO and its zoom_sensitivity_ratio_mouse. While Valve's method for handling scoped sensitivity is far from perfect, as has been discussed ad nauseam on this forum and other places, it is the behavior that feels most natural to me now after years of playing CS:GO and TF2. After refining this method and trying it out extensively in-game, I'm extremely satisfied with how familiar and seamless the aim feels across all scopes/FOVs. All the other methods I've tried that use Viewspeed or various Monitor Distances just did not feel right across all scopes/FOVs.
Note, this method was made for people who primarily stay in third person except to engage in gunfights. This will need a little tweaking once first person only servers come out. Also note that I've included corrected magnifications for the 8x and 15x scopes, as discussed a few posts above. Edit: these steps are now obsolete, check this post for updated instructions.
1) Convert your CS:GO 360° rotation to PUBG Hipfire using the calculator. For me, 1 sensitivity @ 900DPI = 46.1818cm per 360°, which gives 0.009900 for PUBG Hipfire. The reason that I've used PUBG's third person (Hipfire) for 360° rotation conversion is because it is the mode you will almost always be in when you need to do large flicks. If you hear gunfire coming from 100m directly behind you, for instance, almost everyone will turn the 180° in third person, because the camera angle and increased FOV help you locate where the gunfire is coming from. Then once you have located the enemy, you switch to ADS or scope in to engage them, for the increased clarity from the zoomed in FOV and lower spread/deviation. So the muscle memory you have built in CS:GO for snapping to precise angles aligns best with PUBG's third person (Hipfire).
2) Hipfire is named Normal in the config file. For VehicleDriver and Targeting in the config file, use the same sensitivity that you calculated in step 1 for Hipfire, since they are all the same FOV.
3) Go to this Google spreadsheet and then "File" > "Download as" so you can have a copy to edit. In the green boxes, edit the red text to enter your personal CS:GO cm per 360° from the calculator and zoom_sensitivity_ratio_mouse (my values are just there as an example).
4) To make zoomed FOV sensitivity behave like CS:GO and other Source games with zoom sensitivity ratio, the target 360° rotation for PUBG Scoping is calculated in cm by starting with the Hipfire 360° rotation and multiplying it by the FOV magnification, then dividing by the zoom sensitivity ratio. This way, the change in a zoomed FOV's sensitivity changes according to the FOV in the exact same way as with the various zoom levels in CS:GO. Sniper rifles' first zoom, AWP second zoom, SSG 08/G3SG1/SCAR-20 second zoom, and AUG/SG 55 zoom are all different magnifications and FOVs in CS:GO, but are all controlled by the same zoom_sensitivity_ratio_mouse value.
5) EDIT - For these last 2 steps, only pick PUBG as the first game in the calculator, don't pick CS:GO for the first game and PUBG as the second game to convert. To get your PUBG Scoping sensitivity, pick Scoping under Aim in the calculator, enter your DPI, and manually alter the sensitivity value until the green 360° rotation value in the CALCULATIONS box is as close to the spreadsheet's Scoping target 360° rotation as possible. Keep in mind that the game only uses six decimal places (0.xxxxxx) for config values, so don't waste your time getting more exact than that. This might sound like it would take forever, but it goes quickly once you get a method down.
6) Scope 2X/4X/8X/15X target 360° rotations are all calculated similarly to Scoping in step 4, but they are calculated relative to Scoping 360° rotation. So just repeat step 5 for the remaining sensitivities, matching the calculator's green 360° rotation values to the spreadsheet's target 360° rotation values. Make sure to change the calculator's Aim selection for each Scope level, as the same sensitivity value gives different 360° rotations for each of the Aim choices.
When you are all done, you should end up with a list of values similar to mine below. You will need to look up how to edit PUBG's config file if you are not familiar with it, and you will probably have to make it Read-only or the game will probably revert your values at some point in time. I suggest making a backup of the config file in case this ever happens.
Normal: 0.009900
VehicleDriver: 0.009900
Targeting: 0.009900
Scoping: 0.008749
Scope2X: 0.007732
Scope4X: 0.007732
Scope8X: 0.008532
Scope15X: 0.009665