I'm convinced that any eastern extension that doesn't take the line to a logical terminus (probably STC) would be wasteful. Don Mills is already well-equipped as a terminal station. Why pick up and move that a few kilometres east?
Either do it all in one phase or not at all.
I would tend to disagree with this. The biggest choke point on the current Sheppard bus route is from about Consumers to Don Mills. Extending the subway to past the choke point would help speed up the route. Plus, east of Victoria Park is wide enough that queue jump and/or curbside lanes in strategic locations can improve the bus flow even more.
Extending it to Victoria Park also gives subway access to the Consumers business park.
As far as the DRL goes, the big test will be to see if this new council endorses the direction of the previous council, which was essentially that Metrolinx must prioritize construction of the DRL ahead of any extension of the Yonge subway line.
The amendment that set that direction was moved by Michael Thompson, who plays well with the mayor, and endorsed by a weird mish-mash of right/left councillors. Ford supported it, which is promising. Stintz did not.
I don't think we'll have to wait too long to see if they pass this test or not. The DTRTES should be done and before council by the end of the year for sure (hopefully by the end of this summer, but that's looking more and more unlikely). A firm study with some tangible conclusions will give a very good indication of what direction they want to take.