This thread: People still using Pay 2 Win as an excuse to prevent a system like this coming to FFXIV.
Pay 2 Win already exists in the form of RMT tells. Move along now, if people were buying gold before they would still buy gold now. The people who haven't bought gold yet would probably be as fearful to still retain that stance as now we are talking about account time purchases which directly deal with SE's money (so to speak)
Also I love to hear what is Pay 2 Win in this game. Buying Coil runs? Buying crafted gear, that usually can be made if you had the materials / classes? I never understood this crafted gear argument when most people who are actually good on there classes can play better with less gear then those who are buying this stuff and those that already play good on their classes and got crafted gear, would have likely beat whatever content anyway with the current gear..
This argument makes very little sense in the competitive environment. Considering groups have downed things like T13 in 110 soldiery gear, it's proven already that unless your going for World Firsts, which I'm very sure most of the posters in this thread are not and didn't accomplish such, this doesn't affect you via Pay 2 Win.
The inflation that people claim can come is already in play in current economies, which enters from unchecked RMT from non-SE illegitimate sources. (IE: The Real Problem preventing something like PLEX from working here.) They would REALLY need to be on the accounts buying gold from outside sources moreso then what they currently do.
Can it work in FFXIV? Of course it can. Doom-sayers turn everything down regardless.
Will it work in FFXIV at current? Not yet because as I'm sure many have seen, some known Gold buyers are still running around like nothings gonna happen to them. We would need SE to prove us wrong on that front first.
This is a misguided look on virtually anything that doesn't involve buying direct equipment that's already the best end all gear which is not true in FFXIV.
As to answer your question, it really depends on what is being glossed over here.
Are you talking about the monotonous grind many have been put through for ages having to deal with terribly long cues in the process to even progress? Yes a character jump helps with that. It helps even new players get into the mix and not have to trudge through content years old that are weighed down by the inactivity due to the content being out of date.
Are you talking about crafting / gathering classes? So a person gets to lvl 50 on crafting? What have they learned from this level boost? How to craft? Proper rotations? Who is losing in this situation exactly, the people who want to make money off these people for a little longer?
This time and dedication argument is up to the player. If they don't want to waste time, a lvl jump is not only a personal decision but often a welcomed one amongst veterans players and WoW, a subscription based game, has proven this. Some players had the argument it was unfair, while many more supported Blizzards decision and bought many of these jump characters, myself included. The game has not suffered because of it.