Just a quick continuity note regarding the Surfer:
The Engleheart run no doubt was influenced in terms of how to express Surfer's powers by Mark Gruenwald who spearheaded The Official Handbook of The Marvel Universe. Mr Gruenwald was a proponent of making comics conform to real world science, particularly when it came to FTL travel. Early copies of TOHOTMU indicate Surfer could not exceed light speed without entering hyperspace first. Without covering all the details, this created inconsistencies in prior FTL showings for Surfer as well as subsequent inconsistencies. I'm saying some writers took their cue from Gruenwald, others, notably Jim Starlin (see Infinity Gauntlet), continued to write the Surfer as FTL without ever mentioning hyperspace.