You do realise that your comments are at odds with 3-5-2, I have always looked at our two fullbacks as attack minded especially Moloney. I see no reason why Buchs cannot be effective there. Would have thought our current crop of players could easily adapt to the new system.
I've said this before, Buchs is one of my favourite players and I rate him very highly so this isn't a dig at him. His link up play is OK going forward, neat little one-twos with midfielders being a speciality, but he can't cross for toffee. He really can't; once he gets into the final third he looks lost and either looks for someone else to set up for a cross or will send in a half hearted effort that is easily cleared. I don't know how many assists he's contributed since he's been with us but I'd be surprised if it's more than a handful, and I'm pretty sure would be significantly less than Moloney over a similar period. If you are relying on wing backs to provide width then you really want someone who can rampage forward and whip the ball into the area while on the run. With the best will in the world, Buchs can't do that.
You're right in saying that Moloney
can and he's less of a concern, but as someone said earlier in this thread, he's actually better at bombing forward from deep, offering an overlap with a winger and catching the opposing full back unawares. He's less effective when he starts out from a more advanced position and has no winger to link up with.
Edit: I stand corrected on the Moloney/Buchs comparison - apparently Buchs has contributed 7 assists in his time with us compared to 6 for Moloney. Moloney has chipped in with a couple of gosls himself though. Either way, a grand total of 13 assists between them is nothing to write home about; 1 assist every 15 games from Buchs and 1 every 12 from Moloney!