I think their move to increase J makes sense, since this is primarily offered for connecting long haul pax and limiting it to 4 seats (the A321 went to HG with no C in the last restructuring), is actually restricting J sales on the lang haul. Quite often, the xxx to DUS (or slightly less TXL) segment is sold out, but there is some availablity on the long haul. So far my two cents on strategy.
Now the experience: I so far only travelled one shorthaul J segment on AB, from TXL to ZRH. I truly enjoyed the front row, since seat pitch is terrible on AB. So if they make row 2 J, they probably have to take one row out (as they did on the AB birds going to EW in the restructuring). The catering is basically you can choose any item from the buy on board menu and it's free in J. In my case, it was a late afternoon flight, so I wanted to have a glass of white wine and the tapas. The tapas were available and delivered to my seat. I really liked them, as this is really the adequate catering for this flight, this time of the day. Much better than say the LH/LX shorthaul J catering which pretends to be a full meal but clearly isn't.
However, none of the two white wines was loaded and neither was the champagne/sparkling wine ... so I settled for the one (out of two) red wines available ... The purser was extremely apologetic and I praised him for the great job he's doing under such difficult circumstances!