As much as I'd love to fork out the $40 on steam to buy this game, securom is a red flag.
DRMs are known to install their own drivers and files that mess with normal PC operation, if someone wants to pirate a game they'll do it regardless what type of DRM is used. All DRM is doing is punishing the people that bought the game legally. By using DRM you're asking the game to be pirated with a huge sticker slapped across the whole game's packaging.
If steam isn't DRM enough, then tell me, if I buy Divinity II dragon knight saga from Larian Studio's own store, will it still have the 3rd party DRM: securom, or another?
