There isn’t much different between the powers of TL2 & TL3.
Users at trust level 3 can do the following (source). There’s not much there that I wouldn’t want someone I don’t know/trust to have. I’m not sure a intermediate level will help. What you CAN do is change the thresholds if they are too high for you - we thought they were, but found in reality they weren’t.
- recategorize and rename topics
- access a private “frequent flier’s lounge” category only visible to users at trust level 3 and higher
- have all their links followed (we remove automatic nofollow)
- spam flags cast on TL0 user posts immediately reach the action threshold
- Daily like limit increased by 2 ×