I realise that most the widgets chosen for BA are primarily, the most essential ones. (Custom Formations, RedUI etc). However, I still have some questions and queries to put forward about some of them.
Before I start on the widget's themselves, I'd like to make my own widget selection clear. I've tweaked and retweaked it many many times over the years and I'm finally pretty stable about my widget choices:

Now I'm not saying this is the best choice for anybody, but for me, it's the exact balance between too many and not enough. Note the widgets I have disabled are either because I haven't deleted them or feel I might need them every now and then, but for the most part, all the enabled widgets are my constant widgets that I use all the time.
Now for BA's default widgets:
BlurApi: This is listed in its own category as "For Developers". Therefore, why do us normal players need it? If a developer needs to use it for whatever reason, can't they just have it in their own widget folder?
BA Waypoint Dragger: I've never actually known what this is and what it does. Is it necessary for any reason?
ComCounter: I believe this prints the remaining number of ally (or enemy?) Coms in the console. For me, such messages disappear very quickly and I never get a chance to read them therefore I don't need it. Perhaps a constant onscreen display would be better?
Moho Exploiter: The description says it fixes a bug with moho exploiters. What is this bug and is it still apparent? If not, might as well remove this widget.
Share Tracker: This used to crash my game whenever hundreds of units were shared at the same time, also, it's extremely annoying to have hundreds, even dozens of labels to be placed at one time.
BuildBar: Keep this by all means, but I never use it because there's little room for it on my GUI

Old BA Layout: I think I used to use this but something did it for me, might be Ice UI.
Pause Screen: I found this really annoying and although it helped me realise when a game was paused, it got kinda annoying if people spammed pause or if I wanted to see units behind it, its transparency was never enough. I would use this if it was smaller and I could choose where it popped up on the screen (wouldn't be in the centre).
RedUI: I've always preferred Ice UI. I understand a lot of people don't though so I guess that's fine. Although, the amount of widget space it takes up is very slightly annoying...
MexUpg Helper: This puzzles me a lot. I've wondered what this does for I think, a good two years. I initially thought it might place Adv Mexes wherever possible instead of giving up when something blocks an Adv mexes position. Does this actually work now or what?
That is all, I've left out a few widgets from the default BA list simply because I have nothing to say about them and think they should stay in BA. Feel free to question my own widget list

Amendments:
Co-op Mode Widgets/Gadgets: It would be awesome if Co-op mode was more supported. A few of my own suggestions would be to make some kind of system where if one player in the coop has a widget which controls all units, it should disable everybody else's versions of the same widget in the coop.
For example, Smartnanos. If more than one player has this in coop, it makes it just about impossible to reclaim units because the other player's Smartnanos conflicts and repairs the unit being reclaimed because it doesn't know it's being reclaimed.
Also, if each Com had the actual player's name above its head instead of the lead coop player's name above every Com that would be cool too.
Faction changing: I imagine this would be highly desired for a lot of people. Currently, only co-op'd players can change their faction ingame. Would be awesome if everybody could do this, co-op or not.