For quicker sheeting, you might consider the "Ahs-up" style of sheeting mentioned in one of the magazines a few years ago.
It used a split system with a single sheet for the helm, attached via a turning block on the transom, to a triple block, through which the conventional Junk style of sheeting was attached to the battens.
The author used it on his Sabot dinghy and when he reefed, he tied off the excess Junk sheeting line at the batten end.
I modified it slightly and brought the end of the line forward to the mast, through a turning block and down to a cleat on my tabernacle.
It worked well enough and meant that, in a gust, the helm sheet only had to run through a single turning block on the transom, and not through multiple turning blocks on the batten ends and triple block. Giving a much quicker response to release of the sheet.
Disadvantage is having to make a further adjustment of the Junk line each time you reef, to get the twist out of the sail.
I would be careful about the amount of SJR sail area you put in front of the mast on an unballasted dinghy.
Too much and it definitely will not feather. Certainly no more than about 25% of total sail area maybe less in an unballasted dinghy, with the luff not more than 33% ahead of the mast centre line.
I misunderstood Slieve's original instructions, put 33% of sail area in front of the mast, plus the split, and in one particularly heavy gust, the sail didn't feather and I powered along, basically out of control, until the gust passed. Lighter gusts, fine. The heavy one, NO!.
The fact the Wayfarer has a lot of stability for an unballasted dinghy and I hiked like crazy is what saved me from a bath.
Apart from that one incident, it was great. Went upwind and uptide, fast downwind and easy to reef or drop completely. Ideal for a solo sailor.
Having battens which were too small (19mm) and possibly bending in that bigger gust, simulating sheeting in, as the luff of the jiblet got pushed to leeward, but the leech stayed where it was, may also have contributed to the problem in the large gust. Feathered no problem in smaller gusts, despite the wrong dimensions.
Unfortunately, I still haven't got to sail it since 2017 due to lack of time, family circumstances and now Covid, but have a new set of jiblets with larger dia battens ready to go, whenever circumstances change.
Anyway, have a look at "Ah-sup's" sheeting arrangement for a potentially quicker sail response in a gust.
Dave