Shore is not p2p... I am FTP and I have him. I got 15 shards from each of his two tourneys, and saved crystals (including no refreshes for the saving period) so I could get two countdown to R1 packs. Regardless of your luck, 15+15+10+10 = 50, allowing you to unlock him. Shore may only be obntainable if you are p2p at the moment, but FTP had a chance to unlock him over time. If you are FTP and you didn't get him, you either didn't go for it, didn't save enough crystals, didn't at least participate in both tourneys, or are really low level.
He was worth all that time and effort to get too, as he pushed me into arena top 10, and today I even got number 1. Running EP, Vader, RG, TFP, Shore, and I step all over the tons of wiggs/lando/StHan and droid teams in my arena.
Honestly if you were able to get Shore, empire is better than wiggs, and I'm unsure how it fares against chaze and other R1 rebels (about 3 people on my arena shard have them all, some are even geared, but they just don't use them for some reason, obviously they don't keep track of the meta too well). Based on that I would say rebels and empire are about equal in terms of best squads, unless R1 rebels own empire completely. Still feel like empire needs a few more toons to balance the numbers though, some of us like the dark side too EA/CG.