In the closed testing we had ODST and Spartan difficulty bots, they weren’t perfect as sometimes they’d do weird 180 degree snaps if you so much as look at them from behind but at least they provided some challenge and danger in matches. Bumping into 4 of em alone would get you dropped instantly because they would all focus fire you rather fast and also would try to ADAD you to break your aim off but on Marine bots you can bump into the whole bot team and be able to take all 4 out usually since half or more than half of their shots will miss and their movement to dodge your stuff is basically none.
If you wanna make a compromise in which Marine bots are still kept around and also simulate a more real match, then MIX UP the bot difficulty in a team randomly. Have some matches with 2 Spartan bots, 1 ODST and 1 Marine or 3 Marine and 1 Spartan to simulate that experience of fighting a team comprised of differently skilled folk more.
Another thing regarding the Bot playlist, expand it. Add a BTB variant to it, granted this is a suggestion for all the playlists in general, expand them all and separate them into more sub categories.
I and many others don’t like certain game modes and would rather not play them and some folk show this in-game often by refusing to play the objective which happens a lot, i keep getting into teams in BTB that just don’t wanna do the objectives almost ever and treat it as a slayer game.