Santana II setup

[tyleresco]

Ive got a Santana II that i traded recently but i feel the guitar hard to play (strings are 10's but feel very tight) and there's no sustain nor resonance, is it normal?
I wonder if it's a setup problem or it's a Santana's mood.
Please let me know, any suggestions appreciated.
Thanks,
Tyler

 

[tyleresco]

Strings are 10 and 1 or 2 are fretting i think but i measured trussrod height and it's 10 on the 8th fret.
Action is adjusted fine from 5/64 low to 4/64 high and pup height is 5/64.
I wonder if it's the trem, i dont know how to adjust it!​