Managing client and projects?

Hi all

I have been working on something lately and I wanted to gather some feedback - specifically from UK freelancers.

I used to work in a niche industry, so worked with a lot of offshore teams. Would some sort of online tool that makes it easier to work with remote teams and clients on the same platform be something that you would pay for?

Reason I ask is, obviously websites like upwork, guru etc already exist, but what I have in mind is something a bit more simple, lighter and easy to set up for both your teams and clients?

The the second part is obviously the fees I've paid in the past, I wanted to be able to make more margin on invoices without losing out on fees.

Hope the above makes sense, would love to hear thoughts.

Thanks guys!