Thats true Dorjan, but when was the last time you saw MRM seismic used? On the same note, does that mean the SRM version needs a perk? Its a very situational piece of tech, hence why I brought it up. Either way, the idea was more to free up the pre/def slot than to remove the actual tech, although I admit I didn't make that point very clearly.
I'd be content with tying the Seismic research to something else, or even just one of the different tiers. Its just an option since the eventual introduction of OH will take up a lot of the pre/def slots and the SY suggestion I commented about required more as well. Again - putting options forward for consideration.
There's actually quite a bit of tech all over the core that could be tied together without affecting gameplay very much, if a number of slots needed to be freed up. But I'm sure the dev team already knows that.