I need to go out, but will be back, however, briefly (or not)...

1 = SBD is not encoded to do what the white paper claims; it has no peg, there is no peg, SBD cannot be blamed for something it isn't. Just because people have an idea, doesn't mean it's true - and just because most repeat it, also doesn't mean it's true.

What SBD does is a stability mechanism in combination with STEEM. The two are hedges against each other. It also stops the STEEM price from crashing within the Steem economy.

One major error was increasing the debt ratio from 5% to 10%; there was no good reason for that, at all.

Many people are confused by many things, doesn't mean all such things should be removed.

5 = Where would communities get the STEEM to give value to their tokens? Each would have their own reward pool? Paid how?

This will continue to centralise Steem further - I know, that is the plan.

So what would then be the point in holding STEEM?

2 = Again, what would be the point of holding STEEM?

There isn't just one inflation. The coin-creation rate and coin-distribution rates are very different - the latter would converge towards the former if all STEEM was vested and voting, thereby creating rshares.

The coin-distribution rate is very high because, as you note elsewhere, vested STEEM is low, about 40%, of the whole currency. HF21 has done its job in decimating most user's inflation rate (coin-distribution rate = earning rate), so there are obviously ways of doing so without touching the so-called "inflation rate" of 8%-ish. However, HF21 has also increased the earning rate for already high earners.

I agree that the coin-creation rate's decrease could be accelerated, but before doing so it's worth investigating why so much STEEM is unused.

3 = The long vesting period could be one reason, and 13 weeks is both long and arbitrary. Many investments have processing periods and withdrawal times, so it isn't in principle unusual. I would suggest decreasing it to something in line with the reward cycle eg 2 weeks.

I said it would be short!

One last thing, all your ideas put together just mean turning STEEM into not-STEEM. Plenty of other coins are not-STEEM. The experiment is to have an economy built into the chain, not remove all of it and be left with... just another coin. There is plenty wrong with this POS economy that will never be fixed precisely because it is POS - that's a useful result for the next gen economies.