I honestly don't see a problem here. He's not Antoine Winfield, but he wasn't shy about taking on pulling OL to get them out of the play (which is basically what a CB needs to do in those situations). In situations where he was taking on lead blockers, I thought he reacted fairly quickly and did a good job of getting low and taking the blocker out of the play. He badly whiffed on a crossing pattern at around the 1:50 mark. That can't happen. He's 5-11, 190. He's not going to fly up and crush people like a 205+ pound safety or a midget missile like Winfield.
If he tried to tackle or take on blockers like Wood, he'd end up getting himself killed. The same is true of Tramon, who I see as a really similar tackler to Hayward, at least based on the youtube videos I've watched. TBH, a lot of CBs this size actually suck at tackling low, but Hayward doesn't miss tackles even though he goes low against guys that outweigh him by a lot. He seems willing to do what needs to be done to get a guy down, but he's not going to blow people up which is fine with me for a 190lb CB. A major red flag I'd look for is an allergy to physical play (like Sam Shields at times), but I don't see that here. I think he'll be a solid tackler on the pro level. I don't see any fear when tackler, just an understanding that he's not a big dude and the ultimate goal is to not let the guy get past him. Or, if his assignment ends up being a defender who needs to take on a blocker, to stick his nose in as soon as possible to get the blocker out of the play and make the runner make a decision.