Aeldari rumours

I think this comes down to a mix of incompetence and GW's awful design philosophy. The fact that their rules aren't written at the same time with a unified philosophy means that design philosophies constantly change mid-edition. Moreover, there seems to be an awful lot of one-upmanship with rules written to counter the rules that ignore the rules that save against the other rules...

We have armour saves.
We also have AP that counters armour saves.
We then have invulnerable saves that ignore AP.
We now have Mortal Wounds that ignore armour *and* invulnerable saves.
We then have FNP saves that ignore AP and work against Mortal Wounds.
We now have high-AP weapons that ignore FNP as well as invulnerable saves.
Oh, and we now also have non-Mortal Wound weapons that ignore invulnerable saves just because.

The thing is, half this crap would not need to exist if GW sat down for 5 minutes and actually defined what invulnerable saves are supposed to do and which units actually need them. Instead, they just piled them onto every unit they liked and also made them more reliable. And then they realised that this was a problem but rather than removing some they instead just added more Mortal Wounds. Oh, but Mortal Wounds have possibly become too prolific as a result so let's just give armies army wide FNP 5+ against Mortal Wounds. But wait, now there are quite a few defences against Mortal Wounds so I guess we'd better make some powerful weapons that outright ignore invulnerable saves... And thus the cycle continues.

The sad thing is that some of these mechanics dis have potential but GW didn't even bother utilising it. e.g. Mortal Wounds would have been perfect for stuff like plasma overheats or casualties from vehicles exploding (so e.g. a guardsman would be vaporised but a Marine merely wounded). Instead, those things are just 'remove the model' and Mortal Wounds are just sprayed onto everything else as if from a firehose. Why does every psychic power just inflict Mortal Wounds now? Same with stratagems that deal damage. It is always, always mortal bloody wounds. Why? What was wrong with psychic powers having actual weapon profiles? Hell, even in AoS (the crap this obviously comes from) at least has more interesting effects to go with them - rather than just 400 marginally-different ways to inflict d3 Mortal Wounds.

Also, just to illustrate the shifts in design philosophies, look at the new Tau Heavy Railgun - S14 AP-6 D1d3+6 Ignores invulnerable saves and automatically inflicts 3 Mortal Wounds on any successful roll to wound. Compare that with the pitiful anti-vehicle weapons the """technologically advanced""" Necrons were given earlier in the edition. This is a major issue in that GW seems to recognise issues to some extent, but then fixes them by tweaking only those books currently in development. All the codices that have already been released just get to go suck a lemon because GW sure as hell isn't fixing those.