My situation is similar to yours. At least you have more papers published than me. My supervisor says she is still reading my paper... But she said the same thing more than one year ago. It is a pity that this paper received an award during a conference two years ago, but still cannot be published because the supervisor is "busy"...

Anyway, she has difficulty with understanding my thesis. So I told her of the tuition fees etc... You should be frank by telling your problems to the supervisors. Somehow with some "pushing", my thesis was submitted recently.

Actually, her suggestions for my thesis are only a few, and mainly "cosmetic". However, it seems that both my external examiners are full professors and are world renowned. So, it can be quite dangerous if they are going to be very critical...