I'm pretty sure many are fighting over that slot of transaction recorded at the very last block before halving or the first block after the halving. Fees aren't the only factor that you need to consider, there is also the size, the age of the coins, etc. I don't really know them all.
The transaction size is considered when we are talking about a fee in the satoshis/byte range. I'm pretty sure that in this case the fees are going to have the main role.
Well a bigger block size should allow for more transactions per block, so if anything the fees should go down and a lot more of the low-fee transactions should be confirmed.
I have no idea why you would bring this up right now. There is no chance for that block to be bigger than the limit which is 1 MB. A decent factor is played by the size of the transactions that are going to included in that block (e.g. it could be <1000 TX's or it could be >2000), but there is no way of telling which one is going to happen.
Now I'm not an expert when it comes to how high fees should be for different block sizes, and I'm not very knowledgeable as to the current fees that allow for quick transactions, but it seems more like smaller fees due to a larger volume being able to be processed would be better.
You're stating that 'smaller fees are being processed because of larger volume'? This doesn't even make sense.