I wasn't stressed by the impending Armageddon. What stressed me was having to 'perform' on the Org's constant hamster wheel of expectations to do things that weren't 'me' and block off things that I would have liked to have done ('theocratic' time constraints or disapproved of or viewed as frivolous - after all, there's eternity to do that). It was stressful being among warped ideas and attitudes, even while still mentally in the JW paradigm.
I didn't like being 'on the clock' all the time, seeing 'worldly' people as either prospective converts (on the lookout for opportunities to make my sales pitch but usually letting those opportunities pass, then feeling guilty) or as people to keep at arm's length.
The perpetual state of 'alert' and judgmentalism that the Org keeps whipping up does nothing for anybody's long-term mental health.
Over the years, as I've let go, it's meant that I feel like I'm actually living life now rather than treading water till the New World. I'm generally more confident and relaxed (I still have a long way to go, however, but that's due to going the fade route) and I'm increasingly seeing people as fellows of my community instead of 'outsiders' to be wary of or to recruit.
I bumped into a JW acquaintance recently who complimented me on how well I looked and asked if we were still on 'sabbatical.' I said, "Yes ... and we're happier for it ... as strange as that sounds." I could see that it didn't compute.