When SBD is worth more than $1.00 it acts as an amplifier for post rewards, making them much larger than normal. This is great for getting new users on the platform and the side of effect of encouraging spam.

My take on SBD is that it distorts how much liquid rewards are paid out on each post rather than amplifying post rewards.

I think this is detrimental at a fundamental level as it just encourages people to cash out their stake rather than locking it up a portion of earnings for some period of time and actually having stake in the platform to incentivise behaviour.

Back to the question do we need SBD or does it just complicate the Steem Ecosystem?
If we can first agree it is a good idea to have a stable asset, then we can discuss how to make it work, but without first agreeing on this premise we just keep going around in circles.

For the record I think a stable asset is a great idea if we ever hope to attract large numbers of people to the platform.