I have a slight suspicion, that you also going to change EIN because it can save a raid from a wipe in the too hot to handle raid.
I was in this raid only for two tries so far in a pick-up group and therefore I cannot tell much currently (I play DDO mostly in pugs because I'm not in a big raiding guild).
Howsoever, I have the impression that you have in general a big misconception about who is responsible for server performance issues.
Rather than thinking at the first place what YOU can do against lag you just assume in the first place that the players are responsible for performance issues and it needs to punish them so they play in a performance friendly way.
One of your "great ideas" is the Dungeon Alert mechanic...
And now another "genial idea" is to nerf EIN from an ability that can potentially save the day to a simple death spell.
Yes, indeed EIN as it currently is encouraging players to pull as many as possible monsters together and wipe them out of existence all at once and yes indeed I just assume this can cause server performance issues.
But I hardly believe that it causes issues when one EIN kills 6 instead of 4 targets at once...
Anyway, I wonder still if you ever get the idea that you have to make DDO player friendly and not the players DDO friendly?
Do you not see that DDO is for the players and not vice versa?
e.g. if too many agro monsters cause performance issue you should get ideas to prevent that no matter what the players do.
The best way for this would be most likely code optimization and/or better performing servers, my suspicion is that the foremost better code would use much fewer server resources.
And if you going to handle the problem with game mechanics, then you should think in the first place about things like limiting the monster spawn or how many monsters can be agro at a player at once.
This reminds me of a player who started a group with his 2.5k HP barbarian on R8 in the oath of vengeance quest.
He died in like 1-2 seconds and his opinion was the healer heals him not fast enough.
While he is of course not completely wrong because healers can, of course, heal faster if he is not literally one shot...
As I asked him that his character might be simply not ready for R8 in that quest he told me: no he is completely fine and it is just the healer who is the problem.
(as additional information, I told him before the start that my FvS is an Arcane Archer and only a semi healer)
Just to mention it, I created a barbarian on my next life with 4.7k to 7.5k HP and with this, it was not very hard for any healer to keep me alive in that quest on R8, even a Warlock was able to heal me enough.
Unfortunately many have the misconception to rather make others responsible than thinking about ways what they could actually do to improve themselves.
Basically the same with the DDO developers, you think with DDO everything is fine, but you should rather think about ways to improve DDO rather than punish players for there normal playing.
Many other games can handle way more monsters than DDO without any noticeable performance issues.
So please stop to find cheap excuses by making players responsible and find real solutions!