Ooh, both nice designs,
I'm coming around to the stats on the SEAL, I think you've justified the UMU nicely and the ground speed is great. My main problem with the SEAL is that while mechanical jump boosters give 1 jump move does it really allow hot dropping? I suppose it could be argued that it is built to cushion falls from around 60 feet with airbreaks or small decelerators of some kind otherwise it would break itself when jumping, so that should cover it for a WIGE, but hydraulic rams should not facilitate drops from higher altitude even if the rules say otherwise :p
The MkXXVII on the other hand has that nice parafoil which seems a great addition for stealth insertion. The extended life support gives the MKXXII longer endurance in hostile environments and full jump jets give it great mobility, although not so covert when those are active.
I'm fine with the PA(L) having weapons carried in armoured gloves - both designs so far have gone with that and I don't see why not. At the moment I'm rather liking the SEAL as the base chassis but replacing some of the equipment (Maybe Heat Sensor and Power Pack) with the Parafoil which would solve higher altitude drop issues and also give it that stealth airborne insertion capability. 25KG of mission equipment should be able to pack additional power units and hand held sensors where these things are expected to be needed.