Built-in autosave feature (for the TE version).

Oelm
and he replied to me, you don't know how to play

In my opinion, if Oelm and Asm were to play, I would bet on Oelm... now, because of such approaches, should we ignore the opinion of a player who plays often? It seems that Asm is becoming more and more selfish, hiding behind such words.
I look at these discussions and it makes me smile; nothing has been done yet, but everyone knows how to do it better.
My brother was right: DO IT AND DON'T INTERFERE WITH ANYTHING (don't argue with anyone).
And about Oelm, I won't say anything at all....
If I'm doing something, it means I've thought about it a little.
It is difficult to describe the entire concept of the add-on, because it is still only in my head and is based on many factors.
I can only explain a little, for example, using the word:
As Vic wrote eloquently, slow is perhaps the strongest first-level spell, and

In SoD, the presence/absence of mass spells is one of the central factors for evaluating the success of a build/development

Very accurately stated!
Therefore, it needs to be changed.
Secondly, I want to bring scrolls back into the game, so rebuilding the lower floors will be less decisive.
Thirdly, I want to make all the balancing changes with minimal changes to the gameplay (relative to SoD), and rebuilding the guild is already a new gameplay element.
Fourthly, Vic's correct remark about the control problem, so we leave the option of rebuilding the guild (if this problem is solved, then rebuilding will not be necessary). For example, as an idea, a mage hero with some magical skill (such as wisdom, for example) can, for a fee (like rebuilding the corresponding floor), while in the castle with an already built floor, "re-learn" spells ONLY IN HIS BOOK. This will boost mages, which is what is needed, and "rebuilding" will be a personal prerogative of mage heroes (but all these thoughts and ideas are in the very distant future) (by the way, this thought came to me just now and I really liked it as an idea for Wisdom)
Fifthly, options are very flawed (if you're interested, I can also comment on that), so we limit ourselves to the first option of rebuilding the guild and do not make the slow spell option on the first floor.
Sixthly, in general, the T-based magic balancing, in my opinion, is very successful, and people played with it without rebuilding the guild (until version q).
Based on the above, we put slow on the second floor.
I can also answer specific questions, and I will ask the hotheads to calm down.
If anyone has suggestions/objections and can present them in an argument, like Vic, I will gladly listen.
And statements like
"without rebuilding guilds, slow on the 2nd level is a dead end, if with rebuilding, then it's normal"
this is not an argument.
And one more thing, the main direction of the add-on is to improve the interface, all balancing and gameplay changes are secondary - here I am just trying to find a compromise between balance, a minimum number of settings, simplicity and a minimum of changes relative to SoD.