PRO may be "so far from p2w compared to other games" but that doesn't mean making fly only available for those with an MS does not make it p2w still.
I'm just thinking, those with the MS able to fly around and make trades within seconds, vs all those without MS having to spend a lot of time (not to mention $$ if they have to hop a train or something) to do their trading...that would give the former too great an advantage. all the money and time (time = money) they save, they'll be able to afford the best comps, therefore have an advantage in tourneys and everything..
I gotta agree with Quakkz, I feel like fly being MS only is p2w- and I'm able to get the MS and will probably get it. I don't think it'd be fair to those who can't. :(
Fly isn't totally decided yet so we still don't know whether it will be a MS thing or not but as @Arnie said there will be subway station linking from one Pokemon center to another with small cost, so I think this is fair for everyone in a MMO setup.