The OP raises some good points, although I have to agree that Verizon is hard at work on the DVR functionality, but may be distracted by adding some of the flashier(I'm talking to you Twitter), more marketable functions than the real nuts and bolts that make a great DVR.
Here are some additional points I'd like to make. I was previously a Tivo Series 2 customer, then had a DirecTivo, and then a DirecTV HR71, so I've seen some of the good and bad that others are doing in the industry. Verizon's DVR isn't the worst (the HMDVR is very cool), but it could be so much better.
If I think of more I'll post them.
I was reading in another thread that a lot of this is on Motorola and their inability to develop new software in a timely manner. I also read that in early 2010, VZ is dumping the Motorola and switching to the new Cisco/Scientific Atlantic DVR.
I wonder how difficult it'll be for those of us stuck with this Motorola unit to upgrade to the newer one when available?
I really like you 8 points about the DVR with my most demanded being extra storage and your #5 - why can't I delete something on my DVR from my remote STB?!? We have to remember which episodes of shows we've watched to delete them the following moring. Of course, this wouldn't be critical if this unit had a reasonable amount of storage, but since we're constantly in the 90% full range it's a HUGE issue!