For experienced players, it isn't such a big deal but for the new/returning it does no good and is just bad bad bad.
Quite on the contrary. The biggest problem for the new/returning players is the lack of ability to find interaction. Not even necessarily a group - what about a pk opponent of equal level? When was the last time you participated in pk with both sides having non-trash chars below lev10? Right, 10 years ago or so; these days everybody is lev15+ just a few hours after the wipe. Certainly, you may invite a newbie to your clan and level them to 25+ or whatever in no time, but i personally find being the "assist dummy" more boring than anything else.
Then, the level suggests a certain choice of zones. Basically, if everybody is 25+, low, mid and even many mid-high zones have little to no role in the game. Certainly, a mid-lev zone may have half a dozen rank mobs, 1-2 nice loads and maybe a hiding spot, but all that could be safely moved to the nearest high lev area and the rest of the zone thrown away. In fact, keeping even that isn't really important - high zones provide bigger ranks and better eq.
On the other hand, if it takes time to get to the end game content, all those mid lev zones suddenly become important, the quests worth solving and the eq worth keeping. Thus, the game becomes more diverse, which is good. After all, if it were only the end-game content that mattered, why not make every char lev30 from the very beginning and save every player some time and effort?
In reality, the whiners aren't really bored by leveling itself. What really pisses them off is that other ppl know the game better and were not so arrogant as to learn only the few highest zones. Now the ones with diverse knowledge get their fun from lower zones, and explore more and eventually level and proceed to higher ones, while the loosers keep whining because now they're too low to do the 3 ultra-high zones they learned from the logs without ever exploring anything themselves.
An example came to my mind: the Wayreth tests. Everybody i talked to enjoyed them. And yet, you go to Wayreth at lev10, not at lev30. There are other low and mid zones that are just as exciting if you consider them per se, not as a lengthy boring intermediate step before proceeding to the "real, lev30" game content.
Third, getting to the end of the game too fast leads to boredom and frustration. Once a caster gets all the spells, what they usually do? Roll a different char and play it. The less time it takes to get a new spell, the less it is valued and the faster playing the char becomes boring.
Same with exp. The easier it is to get levels, the less enjoyable is the moment when you finally level.
Finally, almost everybody who posted in these thread dislike the new exp tables. My statistics is different: when i discussed the new exp with my groupmates in the game, most of them either liked it or were neutral. Just they didn't care to post their opinions here.