Forty views so far, though only posts from me as yet!
Yet, even though there are no posts from others, the number of views seems to indicate that there is interest in this thread.
So, some more points to consider.
Which characters should the font contain?
In addition to many of those in the Font Creator 5.0 set, I think that Y macron and y macron should be included, also the alphabetic presentation forms U+FB00 to U+FB06.
An interesting character to include is U+FFFD REPLACEMENT CHARACTER, which is mentiond in a Public Review taking place by the Unicode Consortium. Issue 74 on the following web page.
My thoughts on that Public Review are to keep things as they are and to encourage fontmakers to add U+FFFD into their fonts.
So, adding U+FFFD into A_Serifed_Roman would appear to be a good idea.
I checked various fonts on this system, a Windows 98 PC, so not the latest versions of the fonts perhaps, and found that most lack a glyph for U+FFFD.
As it happens, my Quest text font has had a glyph for U+FFFD for some time, this being because at various times I have added items about which I have learned into Quest text.
However, most of my fonts do not presently have a glyph for U+FFFD.
It seems to me that having a glyph for U+FFFD is perhaps an item in which independent fontmakers may be able to be faster to react than many large font companies.
William