I am of two minds about a lot of this.
I generally am actually okay with how the XP works at the moment. It doesn't take long to get to a decent level where you have a wide access to quests, but beyond that it takes a lot longer to gain power. It took me a little more than a month to hit level 10 (Though I only died once,) and while I think it should be faster I don't think it should be by very much at all.
I do like that, with very little investment, you can get to a level where you can compete. The difference between 8 and 10 is... fairly minimal for most PCs with some notable exceptions so not having to dedicate a whole lot of time to get there is a good thing.
But I've also been playing basically non-stop for the last month, and have put in more hours than I care to admit into the game as a result. CoA is so hard to play casually and I think this sort of thing makes it very hard for players who aren't on every single day to see the progression as anything other than tedious. I think players put a lot of emphasis on those last few levels, and while I don't agree with that necessarily I also understand why it can feel like you're not really moving if you're trying to play the game more casually.
I don't really know what the solution is here. There's not really enough content at the high end to support just removing the XP filter and letting everyone level normally (thus embracing the level cap we have, one of the better design choices made early on,) but the current system just feels really bad. This feels like the easy solution isn't actually the best one until more of the server feels complete. When there's more content for max level PCs, I think I would be more behind upping the XP gains a bit. As it stands, this is a secondary change.