Some folks want a strong Bitcoin, that can do what VISA can't do - to be a decentralized, trustless, censorship-resistant digital currency, a store of value with its own sovereign monetary policy - with additional functions such as faster payments & smart contracts being layered-on-top future options.

While some other insensibly covetous folks (as should unfortunately be expected from a community filled with too many short-sighted greedy degenerates.. ;3) would prefer a fast Bitcoin, that strives to copy what VISA has already been doing for decades - attempt to be a competitive, mostly centralized payments processing platform.

..Why do you want BTC to be another credit card? What makes you so confident BTC price suddenly pumps to heaven because a majority voted for bigger, bloatier, spammier blocks and fewer, larger, blackhat-DDoS-cartels-enforced mining node farms that government agencies around the globe find much easier than LulzSec member..?

You can focus design towards a strong sovereign-monetary decentralized trustless censorship-resistant digital currency ; Or towards a fast less-decentralized digital currency + non-trustless censorship-vulnerable payments network.

Choose.