I highly doubt that the developers will read any of the feedback, they have given us plenty of examples that when it comes to actual game development and where this game is headed it is pretty much set in stone and our say in it goes as far as the occasional event (which are pretty nice) but no further.
On the off chance that they do I would like to say a few things. It is obvious that the current battle system was never meant to be the final design, so a revamp was to be expected at some point. We, human beings, don`t really like change, especially one that brings so much uncertainty. So it is absolutely normal for it to be met with a lot of negativism, especially when we are not being told the
most important thing.
The reason why the current battle system is tolerable, even with all the bugs( e.g. debuffs not clearing), all the things that can annoy you beyond reason ( the last unit of an enemy squad doing as much damage as half of it even with -70% attack damage debuff o.0) is because of the results of the auto combat feature. With the amount of battles we have to do on regular basis (8 per province, tournament or scouting) the more advanced players will be overwhelmed if it is not present in the new battle system. Furthermore, at the moment we are used to being able to advance at a certain pace ( 1 province per day, X amount of provinces to n-th level per tournament) all thanks to the auto combat feature. When this change hits the servers if the pace of province completion drops drastically and the amount of KPs and relics, and runes we are able to acquire throughout a tournament have diminished substantially, people will rapidly lose interest in the game. There is not a worse feeling in a game than that of having something stolen from you and there is nothing you can do to get it back.
The auto combat feature is the only reason why players are not being overwhelmed by the amount of battles and the number of enemies that we face. If the outcome of the reworked combat system results in players not being able to advance at at least a reasonable pace (for me it might be at at least 80% of what it used to be, for somebody else: 70%, for another: 90%) compared to the previous combat system, all of those players will lose interest in the game, I guarantee it.
Edit: Zanyah - 2016-09-03 - replaced an inappropriate word