Why would allowing you to bypass a change that the vast majority of people have no problem with or even like make up for adding a new mob that a majority of people have no problem with or even like?
I disagree with the idea because
One: I like the combat much more now
Two: It can already be done quite easily within game
Three: This splinters any combat related addition from here on because they need to balance for both settings
I liked the combat. You're missing the point though. Not everyone does. Some people just want the choice, and having it default set to the new combat system is fine, so long as people / server admins have the choice to toggle it off. And no a lot of the community has voiced their disappointment with parrots. They could have included something much more useful or interesting, but instead we have birds that you need to bake cookies to tame. Oh I have to bake cookies? Well this must mean that this mob has some special ability? Oh it dances around and changes colors? Yeah no this parrot was a waste of time and they could have spent that time developing something much more in-style to Minecraft.
Though I'm not saying you're wrong. I just believe having the choice is better for the gamer, but instead you want there to be no choice, and that players should be forced to use a system that they may not enjoy.
. Oh, I'll reply, but I won't be agreeing 
1
Remember 1.9?
1
First of all, getting blocks to orient correctly isn't simply a matter of replacing blocks. Sometimes, you have to get in weird positions, break certain blocks, and sometimes, it is completely impossible or dangerous trying to place blocks in the right direction. If you don't know already, blocks who can rotate have an ID for each rotation. The "R" function will simply cycle through the block ID's. So I guess you could say that the up/down rotations are added into this.
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Try using command blocks.
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The old launcher can still be downloaded and used.
The one annoying thing about the new launcher is that it tends to crash sometimes.
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Could be slightly useful in adventure mode, otherwise, locked items could just be broken.
3
Who wants to spend all that time looking for a desert temple, only to find that it blew up because a mob spawned in there and triggered the pressure plate?
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Are you sure it is a good idea though? It says to only report if you are sure that the server is violating the EULA.
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Those come with their own problems. I've edited the OP, check it out.
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So basically what the wrench does is that it will allow you to rotate blocks that have already been placed. For example, if you right click a piston while holding a wrench, the piston will cycle through its rotations. It will work on any block that have rotations (eg: chests, repeaters, comparators, observers, droppers, furnaces, command blocks [command blocks can only be rotated by an OP in Creative mode], etc.) It will also override the block's regular right-click function (that is, you can't open a chest while holding a wrench) so you won't have to press Shift. It has a durability of 256 (can be changed); each time the wrench is used, the durability will decrease by one. It is crafted using 5 iron ingots and 1 stick.
Honestly, this will be a extremely convenient and efficient way to build.
https://redd.it/55r1bg
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Too complex, strange, unbalanced, and random.