So, as it is currently whenever Tcomms or any other major thing goes down, RND is capable of just shitting out a new version almost immediately, we'll keep the focus of this on Tcomms for now as to keep things brief, for example, a terror or xeno sneaks onto the AI sat and destroys the Tcomms hub, at first glance this is a really bad thing people can't communicate anymore but OOOOPS, RND has just immediately built a new Tcomms hub with no repercussions for it going down and comms are back up with effectively no downtime.
So my suggestion is this, make Tcomms have a "rebooting" period whenever comms are taken offline, be it manually shut down or destroyed. This would enable the destruction of the Tcomms hub to actually be impactful, additionally this shouldn't affect Malf AI too much, the forced downtime of comms being shut off would reflect the usual bluff of "ions".
Overall a minor change that should still create a reasonable impact on how things go down this also eliminates the potential of people pre-building tcomms hubs to just shut down breaking comms even harder, if you were to ask me I'd say at base the downtime should be around 5 minutes but the period of downtime is up for debate.