The amount of usage I've seen sense get in public open is already absurd as it is. You don't need to be in voice comms to take insane advantage of it.
A simple example is Gen of DotF. Mandos come in pre-door open and spread out among the shaft. Jedi sees this, and just uses the mando in-game call. I immediately know there are mandos hiding in gen, and I'm already looking at the usual locations they would hide. This can easily extend to Sith, Dekas, BHs, so on so forth.
Echobase with rebs on defense. Wooks can be hiding at a variety of corners. Sith goes v -> 6 -> 6, and we have avoided a massive initial problem and can nullify any advantage the wook has in terms of surprise.
Lunarbase bottom portion of side. Often forgotten, but one sith can sense the inevitable and rotate, generally saving half their team by just existing.
Corellia. Any sith can sense a reb going thru vents and camp the top of the vents in advance, or just type it quickly in teamchat.
I can keep going with various maps, but I think the point is being made.
I'm not just making these scenarios up either, as I've seen them play out many, many times in public open. If the overall skill level of the pop on the server is on the lower end, they may not take advantage, but just some decent game sense and paying attention will save an entire team a world of headache.
As far as point costs go, I'll gladly spend 2 points for minimap wallhacks. I'll even more gladly spend 6 total points for actual wallhacks. 6 points and I can press one button and have walls on demand. Compare for example that I have to spend at least 10 points for a nade as a Hero, or 15 for a nade as an ET. The points are easily worth it, and the force cost is easily worth it. Learning to manage your force is just part of learning glowstick in general.
Built-in walls is absolutely absurd in its strength for extending ones own life, preventing flanks, and preventing ambushes. Sense saves my ass as a glowstick, or as a gunner with a mildly competent support more often than push ever does to be honest. This applies to open as well as comp play.
I'm still not sure what a re-work should look like to be honest, but built in walls is extremely difficult to defend from a balance perspective no matter the context.