I think it's important to not get 'stuck in our ways' on this issue as well as many other aspects of this game. If the game doesn't change then we are stuck back with all the people complaining about no content. Things MUST move forward even if some of us are unhappy with certain things.
I can understand the frustrations over this issue but at the end of the day it was foolish to think it would never change(even if you set aside that they had been vocal about adding new methods/paths/avenues) In a game with as much freedom as this we should be celebrating the addition of more freedoms not condemning people for utilizing them. If that is the route we are going to take then we are right back to scrutinizing pvp players for pvping and pve players for pveing. The freedom of choice is a pillar of this game and should be embraced.
Now all that said if it doesn't feel fair/balanced on a mechanic level and not just people upset because they didn't have that option by all means lets adjust it.
As it stands I feel the work put into events is just as viable as work put into voyages. Sure one whole level seems extreme but currency spent is currency lost so the choice becomes cosmetics versus advancement. So long as the currency gain is controlled enough to be an 'either or' situation(or close to) then the trade off seems fair. If event currency starts to feel like gold in how much we have accumulated then it's not working. If it makes people more comfortable to raise the price a little then I could support that. I don't feel it should be limited to 'one per event' or anything like that though. If we have currency we should be able to spend it how we please and if these rep letters are available then we should be able to buy them as we see fit.
The fact is even once all this settles some other method will pop up down the road and even the 'level buyers' will be upset because they wasted all that event currency when they could have done 'x' and now it's not fair and they want their currency back or whatever the arguments will be.
I think the rep letters as a method works. If someone wants to buy their entire journey it will still take time and sacrifice. It also plays to those who just need that pesky evasive last level or two. If they need adjusted then adjust them but let's not degrade those who choose to utilize it or lower the method to the point of it becoming pointless just to cling to the old grind that we started with. If we don't like the grind we shouldn't cling to it out of stubborn pride.
We need to move forward.