We have used the "2 + 2" batten scheme for almost 25 years, presently with a UK Lazycradle. Works great. No special track on the mast, either.
Note that full battens do allow cheaper sail cloth, and therefore save a little expense in construction. On the 'minus' side is more friction and often having to buy $$ Strongtrack, and also add $$ cars for the battens.
Try (get therapy if needed) to keep the "R" word out of the conversation. Good sailmakers will build a "fast" and efficient shape into their main no matter what sort of material it's made of. Whether you later decide to cross a 'starting line' is a separate issue.
Never assume that a 'major' loft name will always be more expensive. Often you will be pleasantly surprised by how competitive they are. Service and support will usually be better,too.
And, never assume that a 'discounter' will always be less expensive. Some are and some are not.
I have known an agent for Lee Sails for a couple of decades and he can be very competitive for dacron sails and the loft will provide a decent shape too. He provides excellent customer service.
It's a lower price point, but not as low as the bottom feeders in the industry.
OTOH, modern sails will often be dacron/composite material and have performance and longevity advantages over traditional all-Dac materials.
It's kinda like getting bids for any commercial project: throw out the highest and lowest ones, and closely evaluate the ones in the middle...
Us? We have a great dacron UKSails main, a composite NorthSails head sail, and an original tri-radial chute from a small loft that went away about 20 years ago. All have excellent shape and quality construction.
Happy Shopping! (and be sure that you measure very carefully, especially for the tack and clew offsets...)
ps: today the site will not allow u/l of a jpg image, or I would post a decent picture of our boat close hauled. (?)
So here's a link: