There are a few type of investeros and many of them invest on projects without any kind of criteria, I think a well develeped website without allowing any kind of ICO scam to be there is enough, many good projects ain't succesfully having a good team behind their project because there's lack of investors on their behalf.
Friendly website without ICO scams, then you left if it's worth the investment or not to users, if you plan to do you'r own review per every ICO is it gonna take you quite a lot of time to make it properly but I like you'r idea, something that is missing around.