How could it possibly make the review process slower? Such a tribunal would have zero role to play in reviewing the app. It only steps in if the developer wishes to appeal a review rejection. At which point it is reviewing, not the app itself, but rather the reasonableness of the review process which lead to the rejection of that particular app.

Also, I wouldn’t suggest government bureaucrats as appointees. My uncle, who is a lawyer, used to sit on one of these government tribunals in Australia (not reviewing app store rejections, reviewing rejections of applications for refugee status). He was not a bureaucrat and nor were any of the other appointees. The government advertised for lawyers in private practice to apply for appointment to the tribunal, and he applied, and he was appointed. His background was in criminal defence not government bureaucracy. And it was a part-time role, so he was still carrying on his private criminal defence practice while he sat on it. It is considered a quasi-judicial role (not technically a judge and not having the same prestige or qualifications or privileges as a judge, but performing some of the same functions)