Eeeh seriously was it though? You just had a build up phase that was rather easy to follow by looking at your gauge plus Zerk cd(IR was synced with every 2nd Zerk so there was nothing extra to "manage") and then you would spend it while performing one combo to get some more resource in between. I mean it sure was more complicated than just mashing FC 5 times like now, but it was still simpler than many dps jobs.
What was it "supposed" to do anyways?
The direct crits would just normalize over the course of the fight more or less anyways - as they do. Besides, it had nothing to do with the structure of old IR itself. It's just a nature of ANY rotation heavily based on burst, which - IF actually was an issue - could've been better fixed by lessening the output gap between build up and burst phases(which sounds like a nice excuse to add new, interesting downtime skills, unlike 5.0 did, huh).
The shitty crutch solution we got instead with guaranteed direct crits is not only cheap, but it also brings even more problems on its own - like screwing up synergy with raid buffs, which is horribly unsatisfying in a "wrong" comp and seriously hurts your dps for no fault of your own, worse than rng could. It also locks any new big thing they could add into another auto direct crit if they don't want us to shove it into IR - which you can already see with Nascent Chaos skills. Lastly, have fun with melds if you want to play more than one tank.
Bringing up the issue of losing out by missing a single gcd is so freaking backwards btw. You think you don't lose out now? You lose more, because even more dps is focused on a single gcd in IR than before and on top of it, despite the burst "rotation" being simpler, you're more likely to miss a gcd due to stupid lag or disengaging, because the window is tighter. You have to fit 5 gcds in 10 seconds, while before it was 8 gcds in 20 seconds - so 4/10.
You were never "punished twice" - the unspendable 5 gauge was no different than the "free" FIFTY gauge you're pissing away by missing a gcd now(other than actually being worth way less) - the only change is that you can't see it anymore.
If you like current WAR then good for you, you're entitled to your own opinion on what is fun of course. However your arguments that it "had to go", are pretty weak honestly.