Of all design companies, MIPS is probably the best placed to exploit RISC-V... it's said that the two ISAs are fairly similar, so a) the transition would be relatively easy and b) there's the opportunity to use legacy designs or design ideas/philosophy. It was interesting to read the line about them having some proprietary extensions - obviously there's nothing stopping them from doing that - I guess they'll be "translations" of instructions from the original MIPS ISA...?
The scaling idea in particular sounds interesting - that it's relatively easy to tailor for... any?... use case?