Then I guess it is more sensible to adjust the encounter size at least for the first few levels instead of changing the DnD 5e ruleset too much and introduce much greater balancing problems...
Or let's just
not do that. All in all big encounters are fun, while missing all the time is not fun.
Video games are made for fun, not for frustration and pettiness. Nobody is asking here for 100% hit rate, but 15 AC vs your party of cripples that at best have +7 or +9 attack to their name if they totally deck out their characters and balls to the wall powergame, that's a tad steep for a video game that wants to be enticing to millions of players.
