I think prospectus is a decent word for "view".
The harder part is formulating the target of the view, "all" (omnes) or "the strong ones" (fortes).
One option is to use objective genitive.
With this choice, your sentences look like this:
prospectus omnium (as you suggested) and prospectus fortium
There is a problem with this choice, though.
One could interpret the genitives as subjective genitives instead of objective ones, whence the first one would mean the view held by all and the second one that held by the strong ones.
If you want omnes and fortes to refer to the target of the view instead of the viewer, something else should be found.
If this possibility of misinterpretation does not feel fatal, I suggest using the genitive.
The second option that comes to mind is to use the preposition in with accusative.
I don't know if this construction is really attested.
This leads to this:
prospectus in omnes and prospectus in fortes
This sounds a little fishy to me.
Perhaps someone can suggest a better alternative if these ideas don't work for you.