Help: Have Picasso Trigger...feel like my tank is boring

Ok right now I have a 75g DT that's been active for about a year with (2) tomato clowns, (1) coral beauty angel, and (1) picasso trigger. That's it. No corals, no snails, no shrimp, nothing.

The picasso trigger I've been told will basically destroy everything. Now after a while has gone by I'm wondering what I can do to liven up this tank. I mean it's great, the fish and all, but is there anything else I can safely do with the trigger to spruce it up and give it some more life? I'd like to keep the trigger if possible as he's super friendly and fun to watch, but any ideas??

 

Mine is all over the tank and greets me as I walk into the room, he also likes to nip my food off the feeding stick for the eel and also my fingers as I remove food and flip snails. I have two powerheads and he seems to like swimming in the current.

 

He's definitely awesome. I like watching him spit sand at the other fish. His uncoordinated swimming is pretty interesting too.

 

Mine does that on occassion too lol. I named mine Buddy. Mine kinda movies sporraticly all over the tank to see whats happening.