Definitely a permanent thing. Not excited about pedal inserts, especially since I tend to ride heavy and that makes me a bit nervous.
Seconding the Catalyst pedal recommendation. I have the Evo model but it is unavailable currently.
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pedalinginnovations.com
And I use the Hex+ pedal extenders with the Evos, to add space for winter boots:
BikeFit Pedal Extenders relieve pain and discomfort in cycling
www.bikefit.com
The Hex+ model is drilled for use with pedals that don’t have wrench flats. If your pedals have wrench flats get the other model.
Used this setup for maybe 20 rides so far on my trail bike with SLX cranks when trails are frozen dirt or ice. (Use the fat bike on snow).
My thoughts on the Catalyst is they might be ideal for winter/snow riding, but that's about it. They're really hard for me to jump with, and I hate that they don't have center pins. I've used them for a couple of seasons before.
It was a bummer, they were old square taper XTs on my kid commuter bike. I poached a similar pair off my old stock trials bike and officially retired it.
knowing your posts, you have probably already looked into BB spacer, wider BB & compensating chainline with spacers or a different chainring?
edit: i got curious and best i found was a longer replacement spindle for shimano road pedals. Crapshoot if they would be compatible with flat mtn pedals…
4MM LONGER AXLE | SHIMANO BIKE COMPONENT
Yeah, Changing all that stuff won't impact it the way I figured. I'm waiting to hear back from Canfield to see if they have longer spindles though. I'm curious to how much of a rabbit hole this will be

I do have a set of Daggas on order for now, so at worst at least I have those and can go back. But, I'd love to see if there are longer spindles. That would be pretty kick ass.
Note sure if this is what you are looking for, but I suffer hip problems as well. I use Catalyst pedals and love them. In fact I forgo how good they were until my bike got stolen at Sea Otter and I borrowed the exact same bike to race on, except with Specialized standard pedals, and wow, hip pain came back. The wider platform enables me to move my feet a bit to relieved pressure/pain while still maintaining good contact.
So to answer pretty much everyone's question on what my current thoughts are. Today I rode in what was supposed to be a pavement ride, but was more snow/pavement. I rode with my feet on the last two pins of the Crampons, and I didn't have any hip pain, and I had a lot better control, especially when the snow decided which way I was going. Definitely would have preferred to have my whole foot on the pedal, but my hips did not hurt for the first time in a year (since switching off the Daggas), and the wider stance also made my knee feel MUCH better.