Rules say:
You may not modify any part of the L2Vanir Client
But I think that for mystic class for example the zoom limit make a bit annoying play with that close range.
also, I think that it's a good idea allow players add colours to "system messages" to make easy see fast info in battle, for example damage, spoil condition, buffs/debuff, etc.
My english is a bit bad I think, sorry for that.
thanks for read and reply.