I think BIP148 will still go live but its not necessary in anyway.
The problem is bigger, than you could think. BIP148 it's fake way, 'cause in PoW algo ordinary nodes (core wallets) don't play any role in blockchain network. They cant:
https://github.com/trottier/original-bitcoin/blob/92ee8d9a994391d148733da77e2bbc2f4acc43cd/src/main.h#L795// Nodes collect new transactions into a block, hash them into a hash tree,
// and scan through nonce values to make the block's hash satisfy proof-of-work
// requirements. When they solve the proof-of-work, they broadcast the block
// to everyone and the block is added to the block chain. The first transaction
// in the block is a special one that creates a new coin owned by the creator
// of the block.
These things can be done only by miners. Core clients only broadcast and retranslate transaction to miners. But we can use ordinary servers to do this work. So, here is out conclusion:
We need more miners in bitcoin network. Not users. System with 1 miner and 1 million core clients will be centralized. System with 100000 miners and 1 core client will be decentralized.
And, so what? We in PoW. Core clients
mustn't rule anything. Only miners. And they don't affect on decentralization of Bitcoin network.