This is just some ideas I had while playing solo.
1. Could a system to select more than 1 shard per level for solo players be implemented? This would allow for long plays with not tanky classes and heroes that die too easily in direct combat.
2. Could NPC squad mates summoned VIA potions be brought into the game, like the echo slam potion, but *POOF* here's an AXE scaled to your level with random spells leveled up.
3. Could the item slots be increased and the neutral item slots also be increased? People might complain about scaling, but instead of map main, this could be map turbo mode?