The unopposed auction went 1N(11.5-14)-2♦(♥, slow)-2♥-2N(v slow)-4♥
The pair were playing that 3m was GF, not sure about 3♥, so the rather horrible 2N had to be bid as the only sensible invite.
I think the 4♥ bid is an abuse of the UI, but as the auction will likely go 3♥-4♥ anyway there is no damage.
My issue is:
If this 2N is bid slowly it isn't your stereotyped 2533 11 count, if it's bid fast, it's more likely to be close to this. This can leave partner much better placed to judge whether to play in ♥/NT.
Having run across the banning of some carding methods in EBUland for exactly this sort of issue (that if you hold the wrong cards, you tend to make the reluctant play slowly), should it be looked at in the bidding also ?