I don't need TC for the temperatures I camp in (32-90F) It is more critical for extreme temps. I do adjust my voltages up for cold temps --one of the advantages of the adjustable charger. At 35F, I set 15.2 as equivalent to 14.8 and it does the same charging profile as at 14.8 at 77F so that works right.
Those AGM specs show a range of acceptable voltages, so if your charger is in the middle, that gives you some wiggle room too. TC is getting pretty fussy for RVing. More a thing for stick house solar IMO. YMMV