Thanks for your update and outlining your thoughts. Having the limited set of operations blocked as your softfork is running right now has been heavily discussed in the days leading up to #softfork222 however a supermajority agreed that it would set a dangerous potential trigger:

Running your softfork will just signal to the Steemit Inc Stake key-owner (Tron Foundation) that voting on witnesses is not desired. But per social contract zero-voting, also not content voting is left out. Is that intentional?

Additionally the supermajority of witnesses running 22.2 agreed to block more operations: By only blocking "vote"-operations like yours is doing would leave a serious leak open: The possibility to start a major powerdown of the stake into a new account. This could for example require a hardfork. And a hardfork means all exchanges need to be aboard for the switch, likely having drastic implications for all Steem users.

Although the #softfork222 blocked operations for the Steemit Inc Stake related accounts seem harsh, they are the only way to guarantee no abuse (read: actions against the social contracts connected to the stake) can be done with them in the time we wait for talks with Tron Foundation.

The discussion with Tron Foundation is at 6 March upcoming.