The DLC is worth it when it's on a sale like it is now. It goes on sale every couple months. The sale price of all the DLC except the new Big Bank one is something like 12 USD. For what is an average price of larger dlc in other games, you get about the same content, but spread out over smaller DLCs released about once a month. If you bought it all full price it'd feel like bullshit, definitely, but the sales are frequent enough you don't have to wait long if you wanna get a DLC 2/3 off. Also, a lot of the heists were free DLC. The most recent one being Shadow Raid. I thought the Sniper DLC was way too much money for only three guns, but after getting it on sale, I found them fun enough that it was totally worth $1.60. So satisfying to shoot right through the riot shield guys.