[znpy]

Not a developer here, but a Jira user anyway.

I don't have dislike Jira that much, and quite frankly I think it does it job and doesn't get in the way that much.

I have to say that my team is larger than your, so maybe (maybe?) if you're only five developers then Jira might introduce a bit of process overhead? Or maybe once you have some process in place scaling to more developers will get easier?

It seems to me that the problem here is how you look at things: who brought your company clearly wants to scale you up. Imho you should see this Jira introduction as an opportunity for better scaling rather than a threat.

One little side note: if your company has been acquired then all the games are over (and I hope you made a shitload o money in the acquisition). Don't get too much in the way o management, otherwise it'll be just easier to get rid of you than to deal with you.

My two cents, I hope my options help.