Deep stall was not the big disadvantage with rear engined, T tailed airliners. Once understood it was easily managed. The big disadvantage of this layout is excess structural weight. The fin has to be stronger to take elevator loads, the rear fuselage has to be stronger to take thrust loads and the wing has to be stronger to resist bending (wing mounted engines provide wing bending relief). In all these cases for stronger, read heavier. After all this the need for fuel lines to run through the fuselage was a minor inconvenience. The bigger the aircraft, the bigger the problem, which is why nobody (except BAC) seriously considered a widebody rear engined design. The fact is that Boeing got it completely right in 1952 with the design for the 367-80 and all modern airliners are built in it's image.