My opinion on this matter is extremely straight forward so I'm going to keep my input short.

I personally don't agree with making the exp potions only obtainable through loyalty tokens because that means you have to pay for long periods of time to get any form of use out of them, that feels very "pay to win" vibe-y to me. One thing I always loved about Istaria is that it's fair to all players, no matter what, you could do anything anyone else could do, no needing to toss more real life money into the game than to just keep your subscription running. This here would be like...let's say, you are a new player and you love this game, you enjoy it just as much as an oldie. Though since you are new you cannot invest the loyalty tokens into using the exp pots and thus you have to grind more than one of the older players.

This is coming from someone who has been here since 2008 and I am swimming in loyalty tokens. It's not fair to newer players, and it's just outright expensive.