As far as I see there are a least 4 ways to bring Bardie back. Some of them are more difficult than others, but still:
1. Create a patch that brings Bardie back and share it on decent-monkey.com. Post a normal version on Patreon without Bardie and some link "check some new content on my personal site." Not easy to create? Maybe, but for sure possible.
2. Create 2 versions of the game - one with Bardie and one without. One of them the developer can share on Patreon and the other on decent-monkey. A few developers do it and they are totally fine.
3. Replace the model of Bardie with an older one for the third episode and don't care about Episodes 1 and 2. As far as I remember there is none or almost none of the new content with him in the third episode. Of course, Decent Monkey will have to replace some of the repeatable content from the previous episodes, but it is not so much. It would take time and effort, sure, but since Decent Monkey is now developing the second game, certainly he has some spare time or at least had back then when Bardie was removed.
4. Move completely to Subscribestar. Sure, he doesn't have many supporters there now, but if he decides to move there slowly, by posting something like that for a few months, "Hello, guys, please, if you can, support me on Subscribestar, I will be able to post there the content you all miss - Bardie, the Ranch and so", it is totally feasible, maybe even profitable in the long run, since that content can bring new people to support.