I believe that the fees per transaction will go down definitely as the size per block increases and so do the number of transactions each block can process, so definitely the mempool size will decrease and the fees will go low.
That is what the effect of Segregated witness, this allow to increase the block size and network to transaction much faster, however confirmation numbers seems increased from 2 to 5.
Already fees in online wallets have been reduced their fees to 0.0035 btc and even LBC deposit cost also seems reduced. I hope LBC will rid-off of the deposit fees and transaction fees in blockchain.