I read that article. It basically says congress can decide which topic, cases, and areas any court can review. Currently judicial review is the US precedent and courts can review pretty much anything related to the law based on our current historical norms. However congress can decide which courts get to review which topics. For example, criminal courts look at criminal law, some courts do trade law, etc etc. Essentially this writer is saying congress could just tell the SCOTUS that they aren't allowed to look at certain cases or certain topics because congress decided they are not the court to do so.
It's a nice idea but it doesn't work.
Firstly the idea behind this is that the courts become democratic because they'll be looking at things only if congress allows. In general courts only stymie congress, they rarely give congress additional powers so in general this would be a way to get the courts out of the way of an overeager congress. However that isn't the problem we face. The issue we have isn't an overactive congress or a congress that is trying to get stuff done. The issue we have is that congress gets nothing done, and so its up to the courts to decide things that congress simply can't decide or is punting. For example, if we wanted everyone to have a right to an abortion, congress could pass laws that make it extremely clear that no state can limit that right. Congress could pass laws on gay rights or to better tighten up racism issues or police brutality issues. However, they haven't and so its fallen to the courts to determine these issues. In example, the current standard for police brutality is actually written by the SCOTUS and not by legislators. Isn't that crazy? Less court activity won't fix issues of gridlock. In fact, it'd only let certain problems fester without relief or at least clarity in direction.
In addition, whilst this may may be a way to make the SCOTUS less powerful or even obsolete, but it would eliminate a check in our checks and balance system. More importantly whilst the SCOTUS often has been the perpertrator of grave injustices in our history, at the same time there have been moments where it has been a saving grace moving the country in the ethically right direction, despite unethical and immoral practices by congress or practices to grab power or eliminate democratic principles.