Gee Moe............ and here I thought we rarely disagree........lol
beings as we are hypotheticating on a long passage here.........
Agree on:
1) beefier chainplates and backing,
2) thicker spreader cups/mount, thicker wall aluminum for spreader.
3) would add stays for staysil...
4)staysil would be hank on.
5) all lines led astern.
6) gooseneck would get an uhmwpe collar and guide.
7) rudder mounts, my glassed in transom reinforcement ( (for that future 90 hp.)

cabin top (trip hazard) traveller
9) emergency tiller handle
10) steering torque joint to limit rudder forces.
11) modified swing rudder support to greater bearing area and reinforced rudder
12) Emergency single rudder bracket gudgeons hi and low.
13)flat plate the top of the cb with skins, and matching trunk surface. Even barnacles cant stick to UHMWPE, this would quiet the boat and give considerable strenght increase.... unloading the pin and bracket. arrangment we have now.
somewhat agree:
1)tho I might choose only spare stays., the mast cannot really withstand much more strain and already is more likely to bend than the stays part.
2) Cockpit deck and liner reinforcement, for pedestal(but not a plate, would be ribbed underneath and glassed in place. Since the traveler is carring most of the load.)
3) forward hatch seal improvement.... replace the entire thing with a vertical double lip seal.
4) higher lips and seals on the sliding hatch cover.maybe even integrate the hatchcover into the hard dodger to make it a sliding dodger....... (I like that idea..............this one is really growing on me.
5) centerline bladder tankage. ( and a lot of it, in the existing ballast tank)
6) AGMs's
7) A $#!^potload of those little led/solar yard lights around the railings of the boat.

elec/manual watermaker
9)possibly a foil dimensional change for better windward performance. though I keep thinking of a metal filled board.
10) longitudinal external hull stiffeners.
11) a couple of aft twin keels, wider than the rudders.
transom mod to give me an aft external locker big enough for a small 12 genset.
but I am going to differ a bit after breaking things here.......
Disagree:
1. The mac does not need heavier sails-dont need the weight aloft, dont need the poorer sail form, would rather have the sail tear than deck hardware torn loose. (I fought mightily with myself on this, but I am not convinced that I would have gotten into more trouble if I had not torn my regular jib).
Something has to be designed to give, and for me, I would rather carry a spare lightweight sail, than have to repair pulled and torn deck hardware.
2. no spin, not even an asym. (not for single handers)
3. Ports..............arrgggggggggggggghhhhhhhhhh, this location begs. for a stiffer, stronger solution, after those windows are broken....I would make them smaller and more of them......., foredeck glass to be augmented with a set of shutters/covers for hard weather.
4. huge ass gas powerd emergency pump to keep her dry if holed.
5. a hanging seat that sits in companion way when the weather is so nasty that the bimini and dodger are stuffed.......steering on deck when really nasty was not fun,............I repeat........even in a wetsuit.....it is not fun.
6. I would be leaning to a harder shelled dodger.... With short traveler controls passed through the short walls, (traveler sits on top of dodger). Doesnt have to be absolutely water tight, merely water resistant.
7) auxiliary swing away inside steering. If ya had the inside visible seat in the companion way, this might be nice on a regular mac.

if I didnt have the harder dodger.... stiffeners on the top of the slider (which would also hold the solar panels would keep it from popping off.
Now everyone can easily understand why I am looking at building a 36ft knock off.........lol...........all this crap wont fit very well in a 26...lol