Shadowdancer: I agree that gaining "Shadow Charges" tended to be hit-and-miss and finicky; it was slightly annoying that you lost them if you used rest Shrines, etc. So their suggested removal will be mostly a positive step. :-)
The proposed; three minute 'cooldown' timer, on 'Shadow Manipulation' seems rather lengthy. As the target can be dominated for one minute; assuming it doesn't get destroyed beforehand.
The 'Dark Imbuement' Epic Moment; really needs more work or just completely removing...
Even though the DDO (Shadowform) Rogue is counted as a Shadow; it possibly still touches the floor, but is effectively weightless. Certainly that form, shouldn't really be alerting things like Spiders (Tremor Sense) even though the Rogue is likely still in contact with its ground terrain because shadows don't cause vibrations through the floor.
However, immunity to Tremor Sense (or Blindsight) has likely got a snowball's chance in hell of happening. I certainly can think of scenarios, where that "suggestion" could be employed - in innovative ways - by nefarious players to exploit the system. :-/
Currently the DDO Developers seem to have great difficulty programming monster aggravation without some malfunctioning chain reaction anyway. Because of their failings; we've ended up with unwanted and bizarre things such as Assassinate no longer requiring Sneak attack, etc.
Oozes tend to be a major source of chain-reaction aggravation, erroneously alerting other species, in some quests. Sometimes it's as if the other close-by mobs to ooze will also temporally magically gain abilities like Blindsight, etc.
I've always found 'Shadow Training IV', slightly strange and partly out of place maybe its because of the text description isn't all that clear. Certainly the Shadow Walk visual aspect tends to be more of a hindrance; in most scenarios I come across, rather than actually being useful.