I am going to be adding my comments about each of these coins in this post. Please check back on this post from time-to-time as I will be updating it as I complete my research gathering process. I will correct any incorrect information as I learn or it is pointed out to me. The statements below are what I think to be true based on the level of reading I've done to this point.
BitShares 2.0- ...These issues don't matter as much with longer block times and/or lower expectation of tps, but if you are seriously expecting 1000s of tps in 3s block times sequenced (funneled) into a queue of witnesses then issues will amplify exponentially not just linearly.
- As far as I know, the 3s block time with 1000 tps will be vulnerable to DoS attacks in terms of incoming transactions, because it is known a priori which witness will be producing each block. All PoS shares system suffer this issue, but less of an issue until you start to go for very fast block times, very high tps rates, and very small transacted values for microtransactions with real-time dependency on performance. ...
Now I am aware that PoW has analogous failure modes in that coordination load is driving centralization and the 25 - 51% attack exists, but just because that is so it doesn't mean PoS is a solution. And I maybe someone actually has a solution. We will have to wait for that solution to appear and make a choice between lesser evils in the meantime. - DPOS claims[1] that by having the stakeholders in the system vote, that the controlling group which is the corporation comprising the developers is not in control. Well publicly listed entities allow shareholders to vote, and that doesn't absolve the classification of investment securities. Ostensibly Bitshares is trying to not run afoul of the criminal and civil liability that results from unregistered investment securities, but my interpretation of the law[2] is they may be still acting as a controlling group since investors depend on them to add value to the investment and the future performance of the investment (again I am not making any declaration that they are or are not, I am raising awareness on this issue for potential investors and participants).
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I will try to update it once a week or two, I appreciate your (and everyone else's) input on the matter.
I generally agree with most of your points. I'm not a big fan of PoS, especially this delegated variety where users of the system are expected to constantly monitor the block signers, and especially the latest updates with all the membership and referral bullshit. They do apparently have very high fees now (20 BTS I think but couldn't confirm this), so that may help mitigate DoS.
I've updated the BTS column of the table to question a little bit their tps, fees, reflect that they've made 2.0 transition, stealth and confidential transfers, and their multisig.