Thanks for the detailed feedback. I will try to give my view on your points.
First off, the game was never optimized for mobile phones...and it never will be. The resolution, the icons, the mechanics of the mining...there is a lot of stuff that isn't ideal for mobile phones. It works better on android tablets because of the size, but even there it has its flaws.
You say that the mining feels clunky on a mobile phone and I can see why, but I'm not going to change the base mechanics of the game because of the mobile port. This game is meant to be played on desktop/laptop, and that is the version my patrons support me for. Making a flawless port would simply take too much of my time and I'm a busy man.
You can actually drop Druuna off at her place. The rock starts to blink once she is with you. Maybe you have overlooked it on your mobile device.
I agree with most of your complaints about the battle system. It sure can be a grind sometimes. The battle system uses an in built engine, so my influence on some of the basic functions are pretty limited. It is how it is, of course it could be better...on the other hand it lets me keep up the pace with the game and is fast to set up. But you are right, in another Game Engine I would have made these encounters very different, not going to lie.
I disagree with most of your complaints about the story. I especially don't get your comments about the robbery being pointless. I think it is a pretty good solution to keep you from hoarding food and water, gearing up and steamrolling through the 2nd mine. I also don't get your remarks about the clarification of the dark elves having to protect the slaves. Even though they don't like it, most of them say consistently that they try to protect you (not all of them, Talice for example) and clear the area off of the larger enemies. Elorae and others often say that they can't help you because they have to guard the entrance or have other tasks. It is also stated multiple times that the dark elves are losing women in their own ranks in this mine as well.