Again, and I must stress this. I want to see evidence of the accusation that the 30 Debuff limit is not a display limitation. So far, I have seen none provided and this entire scare is done off of stipulation that's not even factually there.

In parties, when viewing the party list, it is possible to see that buffs/debuffs exist on the player that are not shown in the party list due to display limitations. Clicking on the character individually indicates that the buffs are actually there and simply not displayed due to prioritizing.

Once the adjustments in which the debuffs you provide are prioritized at the beginning of the list come into effect we can start factually verifying if this is actually a concern or not, as we will get a visiual indication on whether or not our particular debuffs are being prematurely canceled or outright prevented due to an actual cap of number of debuffs.

A more factual problem, which is more of a design issue, is the concept of monsters being mass damaged by too many spike damage sources for DoT skills to deal the full of their damage, which would effect SMN's usefulness due to not being a short-term burst class - however this has more to do with encounter design, not system mechanics.