That's how I see it. As someone said:
You can't always get what you want, but you can get what you need...
I don't see much evidence that Brendan particularly values having a sweeper keeper or playing an exceptionally high line. He values ability with the ball, definitely, but I think he'd probably pick Mignolet (the superior shot stopper) over Lloris (the superior sweeper). Even at the start of last year, when we were really playing tiki-taka, our line wasn't
that high, was it?
I wonder sometimes if the "Swanselona" style Rodgers had at Swansea had more to do with the players at his disposal than some undying commitment to Spanish-style football. Swansea's players were suited to (and primed for) that type of football, and Swansea's style was actually extremely defensive--it just defended with the ball. Now he's got better players, he needs to give them more opportunities to take risks.
It's clear to me that Rodgers values quality (and especially "courage") on the ball above all else, which is why players whose best attributes lie elsewhere have had to work so hard to convince him, and Gerrard won't be dropped. But that doesn't mean he values Barca-type players above all else.
In fact, I'm starting to think he has more in common with Ferguson than Guardiola (or, say, Klopp at the other extreme). Ferguson's recent teams at least were completely built around their attackers, selection the best technical players available, and taking high quality shots. Despite the conventional wisdom that Ferguson was a counter attacking manager, Man United, after Barcelona, actually took the longest to get a shot off of all the elite teams in Europe. His teams didn't have an extreme press, they didn't have a very high line, they didn't keep the ball with short passes. And yet they won the league running away.
Since the Sturridge and Coutinho signings, many have branded us a counter attacking side, as well. But that's not actually true. We attack quickly when space is available, but we're also happy to wait for the right opening when it's not. Like Ferguson's teams, we don't rely on taking exceptionally quick shots (like a true counter attacking side, e.g. Dortmund) or on taking a huge volume of shots (Villas Boas teams fall in this category). Instead, we rely on giving our attackers space to work on and only taking exceptionally good shots, and forcing our opponents to take lots of bad shots (e.g. long shots against our brilliant shot stopping, non-sweeper keeper).
That was all a big ramble, but my main point is I'm not so sure we're building toward our version of Guardiola's Barca at all. I'd say the Ronaldo-Tevez-Rooney Man United is much more the ideal template. And so I don't think we need a sweeper behind the defense. Mignolet is just fine (although keep practicing that footwork!).