Both Boxer and Puma with active protection system achieve the desired protection.
The Puma turret as well as the proposed Lance turret for the Boxer have 200 rounds of ready ammunition.
If you scale the calibre up to 35mm I doubt anybody gets 200 ready rounds into a turret.
Amphibious capabilities pretty surely kill all aspirations for reaching the stated protection goals.
Re an amphibious requirement, had a search through the OCD and there is no mention of the CRV needing to be amphibious or have a swim capability.
It won't be swimming ashore under its own power during an amphibious op:
"The LCVS is not likely to be capable of swimming ashore and may need to be landed and have a fording capability. As soon as it is on land, all vehicle systems should be operational."
There is a brief reference to fording in the Key Requirements Matrix but nothing else.
Given that ASLAV at around 13-14 tonnes has only a marginal swim capability (river crossing, harbour inlet etc), the CRV at 28-32 tonnes GVM will struggle. I'm guessing a CRV puttering along at 6-7 knots, if it did have a swim capability, is not really conducive to Army's concept of rapid STOM.
Given that the LCM-1E/LLC (LHD Landing Craft) will each only take a single CRV, the build up of AFV-based combat power ashore won't be quick.
But it is curious that no detail is given on a swim capability to cross water obstacles such as rivers, flooded tracts of land or harbour coves/inlets where a ship-to-shore connector may not be able to reach the beach due to tides etc.