Ryu,
I consider situational based training a must, it gives you a realistic edge that just straight out/paired off sparring does not address, the best is to use both tools, but always include pressure based situational drills.
It’s all about making yourself uncomfortable, get out of the comfort zone, train from neutral positions, run possible encounters through your head, get some gear on and go as balls to the wall as you can.
Do it in different enviroments, on the stairs, in closed spaces like a bathroom, alley or hallway, in the woods, in a parking lot, in light, in dark, in a car, add in improvished weapons, in uncomfortable positions, on your knees, bum rushed, bending over picking something up, hands caught crossed or in pockets, have something in your arms like a bookbag, groceries, mail, work the interception/pre-emptive strike, pick up signals, role-play with verbals, work with a very aggressive mindset, have your partner get serious, spit, yell, call you a mother ****er, act like a ******* who wants some ****, make up stuff, it will all help.
I don’t see how doing stress based and aggressive situational training drills will impair your responses, what it will do is get them working, get you thinking in real time.