1d20 + ascending attack bonus ≥ ascending AC starts as single-digit addition compared to a double-digit target number and only turns uglier as levels get higher.
1d20 + descending AC ≥ THAC0 starts out as single-digit addition compared to a double-digit target number, but as the levels go up...
I got into the hobby in the 90s — the 1106 D&D tan box and AD&D 2nd Edition — and the way everyone around me played was trad. Plotlines, protagonists, and playacting. If you could railroad under the table to make a story happen, awesome, that meant that you were a good DM who cared about...
It makes two other noteworthy changes: BFRPG has no alignment mechanic in the core rules; and the all-important 1 g.p. = 1 XP rule is relegated to an option (like in 2e).