I'm English, and pronounce "pyramid" as pih-rah-mid, "pyromania" as pie-roe-mane-eeah and "pyra" as pie-rah.
Does that help?
Same here.
I'd be surprised if any English person said it differently. That's how we're taught to talk
I'll wait till ED does his first YouTube video of it and see how he says it, I'd then take that as the correct pronunciation, even if conflicts with how we'd naturally say it.
For the reason mentioned already be ED and others, product/company names don't have to be real existing words, you can make something up and pronounce it how you like.
...within reason, of course