Taking an idea from another answer to make a better answer would be good as Meta-Ed mentioned, but it should also be noted that we disallow exact duplicate answers. While an answer that compiles other answers would not be an exact duplicate, it would be very similar in principle if you have nothing to additional to contribute of your own beyond what was already written.
I also fail to see any good reason for just compiling the other answers. They are already compiled on the same webpage under the question, so it would not really serve any unique beneficial purpose. If somebody wants to see all of the suggestions, then they can just scroll further down the page in most cases. It takes up extra space for no extra benefit insofar as I can imagine.
Also, answers which suggest multiple unrelated suggestions kind of defeat the point of our democratic system of peer review. If you read the tour, you will note that it states.
Good answers are voted up and rise to the top.
The best answers show up first so that they are always easy to find.
Similarly, if there are any bad answers, then we are supposed to vote against them in part to achieve the opposite effect, and in part to serve as a warning that negatively rated answers are problematic.
These sorts of answers may be voted down the list despite having good information because it is lumped in with bad information, or bad information could be voted up it because it was lumped in with good information, and, unless our readership is telepathic, with the extra special ability to read the minds of people who may be thousands of miles away, sight unseen, we are left with no certain recourse to determine for what people voted.
Compiling the suggestions should probably only be done if you want to do it in a manner that helps to prove why your answer is right. Maybe one suggestion can serve to prove a point about your own, or maybe you want to disprove that the other suggestions are as applicable as your own to make your answer more definitive.
However, I would advise against compiling just for compilation's sake. As a matter of fact, even if you have multiple suggestions of your own, then it is probably just better to write multiple answers for sorting purposes. (Yes, I realize I have answers that have multiple suggestions: I was copying other people until I saw another meta question which raised that particular issue and really thought about it.)