Alright, thanks for the feedback. ^^ I've solved most of these problems as soon as I saw them.
The blue door at the entrance of the Keep is in a required room, and it's explainable by the fact that you visit this room long before conquering the last room (which should be the one in the king's tower you mentioned that isn't accessible from outside anymore).
The Stalwart VS Aumtlich is only temporary, I wanted to get out of boredom so I just took a random empty area and put lots of both in it to watch a battle. It's already removed in the next version that will be posted when The Grand Archive is complete, thus the next update will have puzzles up to the West tower.
After said next update, there won't be any new updates until the Keep is done. After that update, there won't be any until the hold is done, since by then I probably will have one or two testers and won't need to look for more.
I'm giving myself maximum one month to finish it because my subscription of CaravelNet is gonna expire near the end of August (in about three weeks and a half, unsure about the exact time) and it really simplifies things most of the time.
One last note, if you have CaravelNet and you want to submit me direct feedback, I'm usually either building this hold or finishing TCB, I can always interrupt either one to hear what YOU would like in the hold, and if it's possible, I might even add it!
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"
Imagination is more important than knowledge."
-Albert Einstein