Following @vitalik.eth’s EthResearch post yesterday (https://ethresear.ch/t/sticking-to-8192-signatures-per-slot-post-ssf-how-and-why/17989) on what comes after single-slot finality, I have two questions for the experts:

2/ If a 1K validator committee is too small and makes a 51% attack economical (because non-selected hostile validators are safe from slashing), why not a much larger committee, say at least 2^15 validators which is just over 1M ETH? Are large-ish committees impractical?

1/ Why not first increase the MAX_EFFECTIVE_BALANCE as previously proposed and assess the consolidating effect on validator count down to a more manageable number of signatures?