There may be a solution here not in speeding up mobile play directly through internal corrections, but rather through the user interface itself.
If SMG would optimize click box sizes, correct the mobile slider interface and make several other small tweaks including simplifying the attack move entry method (in some way similar to the click enter enter method for PC) then with effort mobile players would be faster on their own without the need to remove whatever delay is built in between clicks (though I wouldn’t object to that being looked at as well).
I find that the primary problem in mobile speed is the additive error of many many small delays caused by click failures requiring multiple attempts for nearly every small action.
While none of this would match the raw potential for PC speed it would create a fair playing field where the average fast mobile player could compete with the average PC player on speed.
If these changes where made then the limiting factor on mobile speed would become technique and that is something that serious players couldn’t complain about. Optimizing your technique on mobile would be just as important as getting your click rhythm right for ultra fast PC movement.
While the speed gap would never fully close. Mobile would stop being unnecessarily handicapped by such an avalanche of small unnecessary “glitches” that break any attempt at actual speed.
(My mobile experiences are primarily on an iPad Air 3rd generation but I have also played on an iPhone6 in the past. Curious if other mobile users find the same problems with click entry failure on their devices.)