I think even without power train, if you can watch videos or farm token... my level 3 team last season I got an 18T that's a star player now, and also picked up a backup GK this season with that team... even if they aren't five* they perform great.. I don't like token wars and to get a GK would have cost like 10 tokens at least.

As you go up in levels they get better. The freebie isn't spectacular, they are s'posed to be average. But, to a lower level team they are better, so you can sell them for $$.