How about…
- 2AnyHero-2Tank-2Heal optional RoleQueue, matchmakered against 6AnyHero Queue, with the option to unlock roles for the RoleQueue with 4 votes.
- AccountMerging instead of RoleBasedSR.
- 2HealerMaximum for OWL/Contenders with no other limitations.
No big deal if you got a throwing Healer/Tank.
No DPS huge queue time issues.
Less difficulty preventing decay for high ranks.
A lot more composition variety than 2-2-2.