1) QoT stops moving to come out of the flower. The Beta3 text indicated that QoT should not stop moving when changing modes.
2) QoT Shamblers get stuck behind walls and such, specially in the crucibal map. (that map seems to be plagued with pathing issues). Summons seem to have less problems getting stuck.
3) QoT shamblers will not attack buildings. They will attack anything else though.
4) QoT splash damage for regular attack when inside the flower is extremely low range. Most of the time even when there is a large amount of enemies clumped together QoT will only deal damage to one.