Something I brought up I think 18 months ago could work well with this considering the framework is somewhat "done". Using a scaled down version of this menu it could be attached directly to an alien or item on the battlefield from a right click floating menu or similar. The basic idea is to add a sort of RPG element attached to objects that need to be uncovered through research and time. For eg, when you first uncover a new Alien all these stats are classed as "Unknown" giving a sense of curiosity and uncertainty which could "unlock" by different triggers. Many different stats could be added.
The Xenopedia menu could be treated as a entire book while the in-game menus keeps you engaged. It might give the combat some grounding to strategy outside the shoot to kill mechanic.