It's definitely very frustrating to get a 5* that's basically garbage vs other 5* heroes. I pulled Freya in the elemental summon a few days ago and was pretty bummed knowing she'll just be SE fodder. It would be nice for all 5* to have the same stats vs another 5*, but I know SG won't do that for free. That's why so many costumes. If they would at least just give every 5* a costume with the same stats vs another in the same roll (tank, support, healer, dps, etc), then we could summon and that would be that. There are so many abilities, families, and passives that the variety of team builds wouldn't make the game boring. Just my $0.02.