You can buy potions with almost same buffs from PvP vendor for bori tokens. And don't forget, some of them req 20 level guild renown
The thing is, it is not that it may be easy to acquire that is wrong, what is wrong is that these pots will be mandatory to be competitive. If the pots where awailable with some restrictions, IE a person below pvp 5 can only use them, then it would be another matter. But now it will just be another thing people has to grind/pay for to stay competitive.
And if what you say is true, that you need to have a lvl 20 renown guild, that is even more fuacked up. (and my guild is lvl 20)