I am proposing a bunch of alien downgrades (And some additions with the rewrite). lets just get into it
Xenomorph profile rewrite
The 8-A aliens are from a crossover, AVP, of which is basically alternate canon/non-canon that isnt even connected to anything in the alien universe, thus it should not be used. Seperating the xenomorph profiles so that one covers the main canon, and the other covering AVP could work. The rewrite is here
One Armed Xenomorph downgrade to 9-B possibly Far Higher
The scan of it 'hurting' the queen looks more like it startled the queen more the hurt it, with it having no cuts or scratches whatsoever. Considering that it survived being hit by a spaceship, and being hit by a giant machine, the far higher is warranted.
Comic Big Chap downgrade to 9-C likely Higher
Dennis wasn't even killed by the strike, it should still be 9-C for killing him via headbite though, the 'likely higher' for its large size.