I'm surprised that suggestions comes from you, however let's evaluate :
Dimensional Siege - totally agree on having more castles on Dim siege, but for fun, i bet your interest is another. PS: Why you don't take your friend Fuuhouhou and the rest of Hybrid.pet to take Aden in Dim siege, for fun for example?
Clan reputation points : i believe the clan reputation should stay as it is, if that would be increased ppl( like you for example) will make a clan level 12 in 1 month( where is the trick? You don't have enough clans to make Throne of Heroes?
Valiant scrolls as reward? What for? use Visa buy some, i bet a person like you with top gear can afford to buy Ncoins for consumables( rumours saying you never bought Ncoins with real money, you used only adena), if you expect all items to be given in game, NCwest will become a fail business.
Mana Barrier from Feohs? i can't make sense ...do you think grinman is doing that? ohh no...Wintra? so you are saying that your own clan members are abusing the system?Have you reported them for this unacceptable behaviour?
Rocky Camouflage, i think it should stay as it is, put yourself in an ISS skin what defensive skill they can use? Oh wait i see where is the problem....lllllAlllll rock that's the problem!
With other words what i understand from your post is that changing some game basics/mechanics will make the game better? hahahaha in who's favour? for what purpose?who's purpose? I know it's painful to stay in Aden North gates for more than 6 months and pray for taking that bloody damn castle (i/we have been in that situation before, i know how it is). Issues related above are an "influencer" for top clans/players (we talk about 10%-15% of server), has nothing to do with regular/mid players(90%-85%) ...so in conclusion your personal interest.
PS: If to change something i would remove all skills that Cursed weapons are giving(useless and annoying) , i would perma ban all chars/accounts abusing the Shillen's soul cry restoration, ban RMT'S and i believe that would be an actual game changer.
Cheers'
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