They won’t but it would be fun. I never really got to experience that because I was a complete noob at the time. Would love to try it out
Pre-release, "Finesse" aka Ultimate gain was such a huge selling point for the combat. The idea that you built ultimate faster the better you played, using dodge, block, interrupts and exploits, really emphasized the core of ESO's combat. Unfortunately after release, it mainly meant building for crits.
If they can implement it more along the lines of the original vision, I'm all for it.