For offshore work, or for people less physically inclined, having the leechline run to the head and down the luff is absolutely the right call! If the main is eased at all it can be quite dangerous to try to adjust the leechline at the back end of the sail, and even if trimmed in tight it can still be difficult and dangerous in rough seas to do this. Having the adjustment at the mast solves all of thisAll standard steel cringles are in place, but a LFR is attached by a short tether to each cringle as an optional path for the reefing line. If the LFR tether were to part, the standard cringle is the backup.
The OTH leech line runs in a sleeve up the leech, through a small block sewn into the head, and down the luff. At each reef point in the luff is a jam cleat for tensioning/securing the leech line. This lets you make this adjustment at the mast, instead if near the end of the boom - perhaps with the boom more to leeward than you might want to be reaching out to in some conditions. Also, I have a full-cockpit bimini, which makes it difficult to safely reach where a conventional leech line would be.
I'm relying on the sailmaker to decide optimal batten length and amount of tapering