The 10cm infantry movement is unworkable.
I've had games against four different quality opponents using multiple armies (multiple flavours of Marines, multiple flavours of Eldar, Chaos and Necron, games planned against the group's other flavours of Chaos and Marine, Guard, Orks, Tau and Nid armies).
While you might want to represent the Squats' perceived
lower movement (which in Ork and Squat Warlords was actually identical to Marines, Guard and practically everything else) in the list, the basic infantry movement stat is not the place for it.
Here are the issues revealed in playtesting:
1. Unable to engage Scouts in base contact when engaging
2. Difficult to end a withdrawal 20cm from an engagment. Canny opponents will just need to engage with a units spread across the formations' frontage and laugh as the Squats are hacked down fleeing
3. General manoeuvring to capture objectives, get into the opponent's table half becomes a real challenge. Not a "I enjoy this challenge as it's characterful playing style" but an "argh, I've been challenged to eat endless bowls of beard shavings" challenge
This is exacerbated by a 30cm gun which turns what should be a bastion of Dwarven firepower into a ponderous and milquetoast formation. Short range and poor movement combine to neuter the core power of the Squat list. And it's not mitigated by the disposable Tunnellers that strand formations at pre-plotted co-ordinates. (Disposable Tunnellers are a point for a separate post.)
15cm is slow enough for Infantry. Marines Drop Podding / Dreadclawing in suffer from chronically poor mobility once they're on the ground. Teleporting Terminators struggle with tactical manoeuvre after they've destroyed their initial target - and that's with a 15cm. It's the established stat for infantry. The Squats' playstyle with
low movement is already represented by their comparative lack of zippy assault formations...
- No Jump Infantry
- No Infantry in a flying War Engine.
- Complete lack of Fliers
- Nothing with Teleport
The ironic thing is, that the list already acknowledges that a 10cm movement is inadequate. And rather than up the movement to a workable 15cm, it's got the really ugly Infiltrator workaround.

Y'see, it's ironic that in trying to represent Squat's lower movement, they're suddenly outpacing other properly dedicated assault units. If Moscovian was truly convinced 10cm is adequate then he'd not have given anything Infiltrate. Especially not one of the army list's Core Formation.
And so upping the movement to 15cm still preserves the intended Squat flavour and playstyle. It's also in-line with the general design ethos of 15cm INF. And it matches up with Ork and Squat Warlords.