It's really hard to pinpoint what really disappointed me after the first playthrough.
The XCOM like tiling is good for a turn based game, but there is a severe lack of exposition and maybe a text tutorial on what team member's unique strengths and weaknesses are? The idea of some kind lab rats in SCP-like base trying to escape is really cool, but proper guide and some visual cues of how to approach different foes would be really helpful and without it game feels really hostile to the new player. Great idea, hope after the jam your team will really expand on it.
With some tweaking it would be a great game!