Uhm. In terms of tech I'll explain his laydown in greater detail. So as you all know, Brad is a stance character, and a few of his setups are also stance dependant on them working or not (which is frankly dumb....) But anyways, to add onto that, laydown is another type of stance that's stance dependant. (Yes a stance within a stance...) Anyways lol. How his laydown works if you want to understand why he can be so evasive at times, and at other times not while in laydown is really because of what stance you're in whilist in laydown. That being Open-stance or Closed-stance. Here's an example. Let's say we're playing the spacing game during neutral and I decide to bait Ayane into doing a move and I do PP2K2. If I'm in Open stance, and she does for instance 3PP, her first 3P will whiff. Now I know most of you are all like, but what about the second P that usually scoops Brad up? The awesome thing about this whiff is that she's actually at an absurd amount of disadvantage when she whiffs with the first 3P, so you can actually OH her out of the second P and get your damage in. The only problem with that is if she decides to do 3P2K then from there you have the problem of having to guess and use LFT K which will beat out 3P2K and give you a nice juggle to work with. The main issue though is that now you've dissected 3PP and 3P2K but it's now a 50/50 as per usual with most of his shit... Good news though, this works against more of the casts moves as well and some of them don't force you into 50/50 situations. (Woot!) Here's an example from Ayane again. Let's say I now do 2H+K in Closed stance and Ayane goes for 6PP, 6P will whiff and you can choose to do his OH OR his LFT K with his LFT K being better damage on Alpha weight > Middle/Cruiser weight. While against someone like Rachel or Leon / Bass you'll want to do his OH for more damage. Anyways, that's what I've found with Brad. Feel free to look more into it, and delve into the cast more to see what you can use so his evasive properties can be used to it's fullest.
PS: You'll have to a) figure out what moves changes your stances as well as be able to tell on hand what stance you are in when committing to this type of tech, it's very hard but very rewarding. So I'd say it's high risk high reward imo. It's not "needed" in order for you to be good with Brad, but it definitely could level up your game more reactionary wise as you're having to look more closely at what you and your opponent is doing in the heat of battle.
PSS: Enjoy the new tech! (Or Old Tech).