I don't think there are any updated sensors as the 30C recommendation is applicable to all aircraft. Perhaps the company may be preferring occasional wing bleed warning by retracting flaps to the possibility of damage to the RTLU by leaving them at 1+F.
Yes there are and the limit is not applicable to all aircraft. Our aircraft had the 30 degree limit. But about 7 years ago, they were fitted with new sensors - and now we don't! I do notice that other operators have new A320s and leave the flaps at 1+F during transits, so they are obviously an option.