So in other words you do intend to pressure players to pay.
And what disadvantage? Usually people are complaining about bot's stupid non-human capabilities including with reaction time and aim. Combine this with weapons you don't have access to, that tend to be stronger than yours at least in the mid-early game because they're legendary and sometimes even strong within that category. Bots capabilities also increase the better you do, so players that perform well will often have bots that have non human capabilities, so these weapons just give them yet more advantage.
But your excuse doesn't matter, you said it yourself "it's a good way to showcase players the abilities of freshly released weapons so they can decide whether they would like to give them a try or not". In other words what everyone was speculating. "If you have a bunch of enemies killing you with paywalled ite you might be convinced to buy it" was what was said by players as to why the bots always have paywalled items. In a cynical way by the way because they say that after they've said "of course they're trying to pressure players to pay". I don't believe that's your personal opinion, or else you're in favor of business because if you want an authentic gaming experience NOBODY IN THEIR RIGHT MIND WOULD BE OKAY WITH USING BOTS TO PUSH PAYWALLED ITEMS ON PLAYERS! THAT IS SAYING YOU ARE OKAY WITH A FAKE GAME! Do you understand?
Players already have a way to know the abilities of freshly released weapons before deciding to try it themselves. It's through the community. Which is a far better way for them to get that information than what bots do in game, which is a BAD way to do it. Not good, bad. Using bots to try and sell things to players is bad.
Also thanks for admitting paywalled items tend to be strong. Or in other words mech arena is pay to win. Because as I said anything that results in an advantage for paying players is pay to win. But it tends to be easier to overcome the advantages in real players. You have two solutions to the problem of bots having this equipment in my eyes. Either you stop giving bots this equipment, or if you wish to continue doing so the items need to become available for in game resources in gear hub upon release and you still can't give the under-leveled items to bots.