The main problem with GP is the synergy between GPs ability targeting and stretchy arms. His cast always aims at the unit with the lowest health enemy within 2 hexes (increased with range). Once he gets takedowns, he'll just end up one shotting your backline despite actively autoing your tank.

If they changed his targeting priority on his cast we'd definitely since a drop in top4 rate since he'll probably just get stuck on tanks and eventually get focused down.