Internet pools such as the one hold by Citizens of the Imperium are of very limited usefulness as they don't chart the opinion among the universe of potential customers, but only those die hard fans such as us that actually visit this site often.
I liked Dr. Skull's proposal for T5, however, we should thrust Mark regarding this. I don't think T4 is as bad as many believe. Very low quality editing, for sure, but I still think it is a very decent game. We know that Hunter have convinced Mark to drop the half dice. I don't believe that T4's gearhead section will survive, it would make sense if Mark adapt T20 version of High Guard in T5, making both games more compatible with the original Traveller. If all this happens, I will like T5.
I only want it to be a nice hardcover book. I would even pre-order it to help financing the edition. I don't like games in pdf and I don't think I would actually purchase a book in such form.