This isn’t a dis on your style for the large bag - ride what you want. How much do you need to carry on your usual rides? Unless you’re doing unsupported centuries, I don’t see how you could need that large a bag. My saddle bag is about half that size. I can stuff in 2 tubes, 2 CO2 + inflator head, multitool, patch kit, levers & tire boot. If I’m being particularly cautious, I’ll throw my minipump in a jersey pocket. I’ll ride solo with this for anything up to about 75 miles, more if in a group or if there’s bike shops close to my route.
I’ve been running a varia since the first one came out and will never go back. I’ll wear a giant pink fuzzy backpack before I give up the varia. Having that, plus a small mirror on my left bar end, has literally kept me from getting squished at least once (a last moment hop off the road as clueless pickup passed), and likely other times where I was able to take more subtle actions.