Don't like it very much do they!
Some of the comments, such as long dwell times because of passengers taking their time to get past people with stuff on the fold down tables seemed a bit OTT, as is doesn't cause problems on the 444's which are much more likely to have frequent calling patterns and commuters with cups of coffee.
Most people will, especially if they have luggage, will get up from their seat before arriving at their station.
Likewise their suggestion to have folding tables to assist with exiting from the window seat. Personally I think that they are more prone to getting dirty and tend to look untidy (less sleek lines). Again most people aren't going to benefit much.
Yes there are some undesirable seats, but probably no more so than the flip down seats on the 222's. Not does poor window alignment mean that people don't like the units (class 444 is a case in point, mostly loved other than by those who didn't want to lose the 442's but with poor window alignment). For some, I.e. those who are looking at a screen fit much of the time, they may not mind much not having a window.
Of course, for all the comments about people preferring table seating there is still the issue of if you do as they suggest and get rid of 4 seats per standard class coach that's something like 24 seats over a 9 coach train. That is 24 people who have a choice as to weather to find another seat (if there are any), seat in a seat that isn't ideal or stand and let someone else who is willing to sit there sit down rather than stand.
Again the 444's (which are quite well liked) only have a total of 4 tables and although they are often groups looking for empty tables there can be times when quite a number of airline seats are occupied and the tables are empty. Although it is not common for there to be some (I.e. at least one) tables empty and there to be sufficient numbers of airline seats occupied. OK, the 444's are less likely to have families travelling on them, but intercity trains are hardly full of families and most will have booked in advance so will have seat reservations anyway.
They noticed the slope, but weren't overly critical of it, again I think that people would start to complain about the loss of headroom before being overly critical of the angle of the ramp. As I pointed out yesterday a 1:20 slope could result in the loss of half a metre of headroom but would still be a DDA compliant ramp. I also pointed out that 1:20 is generally the ramp between a road and footway at pedestrian crossings and people cope with them fairly easily.