[She watches, bemused, at the mad laughter. Like she's seen the exact same display a thousand times before. She's done her time in the Cursed Earth. She's seen the people who've snapped under future shock. Junkrat just... Reminds her far too much of home.]

Without knowing specifics, there's only so much I can suggest. If that's all you've got, it might be less 'control' and more 'figuring out boundaries and trying to expand your horizons'. If we both understand that I'm just drawing things off the top of my head here...

[She starts ticking them off on her fingers.]

Can you connect the bags so that you pull everything from the same dimension? Or, if you already do that, can you separate them in case something's dangerous? Could you if you tried? Can you keep people in there? Can you capture things like fresh air and water in there? What about living things? What constitutes a 'bag'? If I set a pile of stuff onto a blanket, then folded that up and tied the top off with a rope, would that be enough for you to do things with? Could you travel through your bagspace and end up at an open bag you've set up at a different location? Can something escape from inside your bags and tear open the entrance?

[She pauses, tapping her index finger against her palm for a moment before shaking her head. That's all she's got.]

I don't know if you've answered any of those. Sorry, I don't even know how your powers work. I'm behind on reading the crew files.