Well, if we could have CPU algorithm pool-friendly (Monero-like?), than I would be all for it.
Pool because we have a thought to enable people mined it from anywhere (from scripts on websites etc.). I too like solo-mining, but I don't see really any possibility to keep, if we want to bring more people - it's quite hard to download client and configure it for avg people.
Well, we should be resistant to any PoW attacks imo, so PoS/PoW/PoB balance must be place intact, to keep it secure at any time.
I'm still wondering, why nobody tried to 51%-attack Bitcoin network early on? People were so loyal to BTC network, and others didn't hear about it? Because it seems strange - I know maybe there wasn't many incentive, but when it started in 2010 being traded on Mtgox, it was still only CPU-mineable, and attack was easy to stage as network was miniscule, and it had already some value (0.06-0.1USD/coin but still).