With regards to PvP:
Prior to Update 23, there was no viable reason to use almost any DoT ability. They were simply not economical (from an action economy perspective) - much like you've done now. You want me to wait 10+ seconds for something to do 25% more damage of what I do in 1 second with a weapon or class spammable? Come on.
A quick recap:
-The Meta (pre-u23) was such, that optimal or near optimal builds allowed you to survive infinitely... until someone did an ULT-CC-Burst. This is pretty well established. Unless you've got a sub-optimal build... the only way you will be killed is in a CC Burst Window.
-Update 23 introduced, thankfully, the new option of a sustain-pressure build. You would have to add 2-3 abilities in your pvp, rather than your single spammable and 1-2 buffs, but it gave you an option - to DoT someone effectively.
-We had lots of cries of how this was going to be the new Meta and we would all die to Dots.
-This didnt happen. DoT builds did appear and that actually expanded the Meta... but the hyper performing builds were still all heavy direct damage burst-CC focused.
-After approximately 1 month, you reduce DoTs to being a trap choice again (unless they provide some buff or so).
Is it the intent to keep PvP in the poor(er) state it was in prior to Update 23? Where the Meta is basically infinite sustain builds that try to burst you down in a window that is under 3 seconds, or else rinse-and-repeat your single-player weaving/bar swapping exercise? Why would you want only one-viable build strategy? This is a big part of ESO having the most options but really the least options at end game (because you better ultra tuned sustain, cc, dd burst or else you're sub optimal).
Conclusion:
-1.25x is a terrible multiplier for DoT vs DD damage. You need 2.5x at least. You have to have a reason to use an ability that you will wait 10 seconds or more for...
-You need to address the classes that hyper performed with that or against that - example Templar. If you're making DoTs viable - no class should basically have a super cheap way to ignore it. Otherwise give another class a super cheap way to ignore DD.
-What in the world is the thought process behind "DoTs" are too powerful but DoT heals are not so they keep the same multiplier? Shenangins!