Would replacing dex to damage with expanding the crit range (say range equals 20 minus half your dex bonus [minimum zero]) work? (with some adjustment in case there are any dex-based champions out there).
Not sure what your asking? Personally I don't think dex to damage was a good idea. What I've heard as justification for adding dex bonus to damage has been things like: Attacks are hitting 'vital spots' is why I add my dex bonus to damage. Attacks a precision attacks so dex to damage. The velocity/speed of the attack (whipping the weapons around dexterously) adds dex to damage. etc (cant think of others at this time).
I don't find these reasoning to make all that much sense.
This is just my opinion. Dex to Damage is one of my "Most Frustrating Quirk of 5e".