A bit more info here. Coinbase will be enabling faster payments which is a first and a huge improvement on the clunky shite you have to go through at present. Elsewhere they've said the UK is their biggest market in Europe by far which surprises me quite a bit.
Compared to a place like the US where there are tons of places to shop with it and buy and sell it then yes it is. I'm talking more about action for regular people rather than backroom stuff.
It's maybe the only choice for UK people, it's a pain in the ass to try the other to get a tiny chance. You can notice in the past many topics in this section from UK people asking where they can buy bitcoins and withdraw to their UK account.
Other EU citizens don't really have reason to use Coinbase because there are better alternatives, so naturally, we use other platforms. Personally, I don't know anyone going to Coinbase for this