I feel the possible importance of Wyll for the plot depends on whether you are more focused on the mundane angle of political corruption or on the more divine angle of taking down one's gods and masters - though arguably, Shadowheart and Astarion sit on the crossroads of both due to Cazador/Lodstarion having everything in place to take over the city from the shadows and the Sharans already pilfering from the nobility. For me, the whole political angle in general felt a little flat. I mean you can get Cazador's complete blackmail ledger but I haven't noticed, that you can actually do anything with it or can you? Everyone tells you how important Duke Ravenguard is, but the only reason I ever bothered to save him, was because he is Wyll's dad.
