Okay,
found the patch notes.Only Diff 10 starts with Mk II ships.
Diff 9.0 and lower the Mk II waves start at 300 - (Diff * 10) so on Diff 9.0 Mk II waves start at 210 AIP.
Normally the 'in-between" difficulties have the same tech thresholds, so Diff 7.0 and 7.3 start the Mk II waves at the same AIP.
However, 9.3 and higher have an additional modifier where the Mk II waves start lower, as follows:
9.3 = 148 AIP
9.6 = 85 AIP
9.8 = 43. AIP
Diffictuly 9.0 and higher also gets a mixed wave composition based on how close the AIP is to the threshold.
]To add back some of the difficulty but in a more granular fashion than before, on diff 9+ (not just 9.3+) waves will have a portion of their fleet ships "promoted" to the next tech level according to how close AIP is to the next tech level.
So if you're playing on 9.6 and have 50 AIP, approximately 50/85= 58% of the mkIs fleet ships in a wave will be promoted to mkII.
Of course, they'll also run into the tech level multiplier which will reduce their actual numbers significantly, but roughly 58% of the wave's "strength" of that ship type was spent on the higher tech level.
As for what the thread is actually about, I'm not sure I have room to comment as I play diff 10 so I start the game getting slammed with Mk II waves.
Having said that, I don't think it is so much the Mk II waves that put people off, it is the jump from Mk I to Mk II waves. Remember that Mk II ships have stats roughly double that of Mk I, defences that handled Mk I waves without much difficulty can fall to that first Mk II wave when the threshold is crossed so the "wall" between Mk I and MK II is seen as artificially high.
What I'd like to see is the mixed Mk levels based on how close you are to the threshold applied to all difficulty levels, but have the mixed waves start at halfway to the threshold. This will make the MK I -> Mk II transition for waves much more even, rather then being this sharp cliff when you cross that threshold to Mk II.
More exactly, I'd like to see something like: ([Effective AIP] - [Threshold AIP / 2]) / [Threshold AIP / 2] for the percentage of ships with the higher mark.
D.