Hey Mike - appreciate your very thoughtful feedback based on some super limited info.

I'm not particularly down on the 11k, it's just so-so -- this session was my personal equivalent of the "Just Row" setting. I pick a distance, go through the warm-up range (~1500m), and then see what it looks like I'm rowing via "projected finish". On this day, at the end of 1500, I was sort of sitting at around sub 60m, and I just kept putting the pressure on, until probably mid way through it looked like I'd found sub-50 and it was about as fast as I felt like I could hold the pace for the last 30ish minutes. You're right, that pace was essentially 2:10ish. That's hard enough for me that I can't sustain that pace forever, it causes the gradual increase in heart rate. My final HR on that piece was 162. I've run as high as 180 previously, but anything up in the 160s is a pretty hard workout.
I don't particularly mind the 26-27ish SPM, it feels "normal" to me in pacing. I can go up to about 32 without feeling like I'm really pushing the pace, stuff sub-24 feels really slow and awkward -- my natural rhythm seems to be higher than that. (This month's CTC is a real bear for me because rowing 20's for me is a constant start/stop non rhythmic thing that makes every pull a giant effort -- thus the effect you guys all saw of my first "from stop" cycle of 250 actually being my fastest time!) Others have also mentioned the same advice you have, "learn to row at the same pace at ~20 or less SPM, and then rowing at 24 or 28 will be explosively fast". It's on my to do list. haha. It's not very fun!!
I suspect that my form is all screwed up honestly - I was recently reading Cal's rowing website (in my quest to find an on the water rowing club that accepts old geezers like me that have never rowed a day of crew in their life), and saw they suggested in their FAQ -- "don't use an ERG before you show up here because you'll learn all kinds of bad habits and we'll have to break you of them". So, approaching 2M meters, I've violated that advice "a bit". As a result, for a huge guy, I think my stroke length is shorter than expected (ergdata doesn't capture stroke length that I see these days). I think that's because my body swing instead of being 11:00 to 1:00 is probably more like 11:57 to 12:03. I also suspect that I'm getting core collapse on the drive, which means I lean forward as I'm driving and lose leg contribution that way. As a result, there's a lot of "how strong is my upper body" in my rowing. It's on my to-do list to make a video of rowing form for you guys to advise me on -- doing solo workouts in a gym makes it a little inconvenient! And candidly, I'm a bit afraid of the bruising of my ego around "OMG what ARE you DOING??!!!" When I really focus on form, I can sense the difference, not in speed, but in easiness.
When I'm not doing my funky Just Row --- I typically do it more the way you describe. Do 1500m at a comfortable pace (like 2:30ish) just to loosen everything up. Then, do a separate measurement piece starting with a couple of shorter more rapid strokes (probably ~40 SPM) to accelerate to desired pace, and then just hold that pace.
As for goals, it's really just trying to return to my level I had last year -- under the theory of another year of experience compensates for the degradation of a year in the mid 50's -- but I had a long break (about 6 months), and added 25kg, so there's work to be done on both fronts to compete with my previous personal bests (all less than 2 years old). Longer term, I'd count a sub 7 2k as a big victory.