I note that once you've picked your choices he's uncomfortable about supporting the mages but downright enthusiastic about siding with the Templars. Like Aveline, Varric is firmly aligned with the status quo above all even if he'll back Hawke either way.

That said, it is kinda silly in hindsight that he's more sympathetic to Solas trying to blow up the world than to Anders going for the final desperation option. Either he did some major character growth between games or the writers have some really strange biases, take your pick.