I've used a variety of Esbit stoves for many years here in the PNW on both the PCT and the Colorado Trail. The OP is correct that, unlike with canister stoves, an excellent wind screen is absolutely crucial for any Esbit stove to work...at all!
That folding Esbit stove is fine for learners, but there are much lighter options that perform better. It has been my experience that small diameter pots have a hard time balancing atop those folding wings, even when set at an angle.
After trying several options, I settled on Caldera Cones (one for each of my two favorite pot sizes) with the impossibly light Graham Cracker tablet holder (yes, they call it a stove, but just barely). The caddy serves as both a bowl and a cup in camp.
IMO, there are only 2 disadvantages to a Caldera Cone, no matter if its alcohol or Esbit-fired. One is a user issue; the other I consider to be a design error.
1) If you damage the cone itself - I very carelessly tripped and stepped on mine in camp - you may not be able to get it completely together or apart again. The tolerance in the dovetail joints is tight. Forcing it can lead to deep cuts in fingers or hands. To cover my a$$ should I repeat my stupidity, I now carry a heavy duty tin foil wind screen that can be pressed into use temporarily until I can replace a damaged CC. An Esbit tablet will burn sitting on anything.
2) The fuel must be lit BEFORE you put the Caldera Cone over the stove. In a high wind, this can be a real challenge. Canister stoves have enough pressure to overcome this due to integral (though only mildly effective) windscreens. Most free-standing windscreens for same have an open side or window through which you can light the flame.
For solo hiking, I will stay with my Caldera Cone, irregardless of altitude, but I will not take it snow camping. White gas stoves rule that turf; canister stoves are a poor second, even if you sleep with the canister to keep it warm. Two liters is really pushing the BTU limits and burn time for a single tablet so if there are two of us, I take my canister stove. It is possible to put 2 Graham Cracker and 2 Esbit tablets in most Cones, but that's too much hassel for me.
You might consider eliminating your mid-day boil (saves both time and fuel weight). I only boil for the evening meal or the occasional cold morning cup of tea. That will bring your fuel weight down to 1 oz per day......or less.
Esbit fuel can not spill, leak, or even spontaneously ignite. It takes a while exposed to an open flame for the tablet to start burning enough to continue on its own. I argue with the TSA that the darn box the tablets are in will ignite before they will, but it's a losing debate. I find a cheap Bic lighter works better than a match.
From my experience with canister stoves, I've found that I can get 13 one liter boils out of a large (8 oz net) canister; 7 out of the smaller 4 oz net canister. I always start with a full large canister and scratch a mark through the paint with my knife after each use....because I can't seem to remember how many times I've fired the darn thing up. If I think I'll need more than that, I'll carry a second small canister or a partial large one. I weigh my canisters before I leave home and again when I return so I can get a pretty good idea of how much fuel I have left in each for my next trip.