Uncle Vlad is one of the best and interesting missions of GTA 4. This is the last mission where Vlad appears and leads to sudden change in GTA IV's story plot.

Obviously, this remake is not meant to be 100% accurate replica, neither as much exciting as in GTA IV.
The mission requires DYOM and modloader. You might (sometimes) not able to hear the dialogues for a short period of time. It is likely caused by a bug in DYOM and replaying the mission would fix it