I moved the dates because, due to personal reasons, I wasn't able to work for almost two weeks, and I didn't want to make an apologetic post about it, making a bunch of excuses that nobody really cares to read.
Version 1.4.0 would've been pushed back anyway since it got a bit bigger. Unfortunately, since it's just me working on this, I can't hand off tasks to anyone else while I'm out. I totally understand that this might make some people lose a bit of trust, but the updates will still come out, and I promise it won't take months.
Considering all that, I'm not setting concrete dates for 1.5.0 and 2.0.0-alpha3 for now. v1.4.0-alpha3 will be out soon, though.
I don't think you're being 'salty' at all, those are valid points. Thanks!