Link to their Solo stems
I hear you. I think by sticking with the WPA + dry pipe that offers cooling and can be held in one hand you would speed up your workflow. I like to pre-load the WPAs I own with flower and keep them capped in their safety tubes for quick use. Sort of like a glass capsule system you can prep in advance.
You get 2 WPAs with the Solo so you can always have a loaded WPA ready. I bought a hi-flo XL WPA from SneakyPete so I have 2 XL bowls always loaded and ready to use. Also, you get the variety of using any 14mm dry pipe you want to roll with at the time.
Lastly, I can't underestimate how nice it'll be to use the Solo inverted in the long run. No flower or resin can ever easily fall or leak into the oven, ruining the taste and causing a cleaning issue.