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It's not easy for me to find (and justify) a precise position, as I am, in fact, "that very slowpoke."
Fortunately, so far, almost no one in the discussion has bothered to try to justify their point of view. I will at least try.
There are a couple of things that seem obvious to me here:
1) The chess timer is incomparably better than the standard one, and it should be welcomed and promoted in every way.
2) Moretti is close to being a benchmark for micromanagement, and if he says that even 2 is too low for the third digit, then there must be something to it.
Setting the battle timer to 1 is a deliberate push towards excessive simplification of the gameplay at the expense of quality.
2 is much better, and in my opinion, for all templates in general – simply because this number doesn't let you get bored, and it doesn't force the player into a constant time crunch, where the first thought in every battle is – click faster.
Regarding "2 too short" – you just need to make an additional approximate assessment – how many battles are there in this template where you need to micromanage thoroughly, and give a comfortable margin with the first digit.
For example, if you estimate that for jebus, 5 battles of increased difficulty are normal, with about 6 minutes each, then (6-2)*5 = 20 additional minutes in the first digit.
Have we ever aimed to make the minimum possible timer when choosing timers? The goal is to find a timer on which you can play normally, but at the same time, you can't slack off. Setting the battle timer to 1 makes it impossible to play at your best level; the player will simply have to give up on some battles to save time. This was seriously discussed as a feature of the M200 tournament. This option can be considered for individual tournaments, but not for seasonal rules and default game recommendations.
In conclusion, the best third digit by default is 2, for all templates and options in general. It's simple and just right.