One thing to help put it all in perspective......

The "E" rockers didn't always exist........ And for years people installed the std rockers on their RPM heads, and the fitment of that scenario is slightly worse than with the TF heads.
I'm sure there are countless motors running around just like that.

If I were building a bracket race motor with the TF heads, and already had the std rockers...... I'd run them.

For a street motor........ I guess it would depend on how much I felt I was really going to drive it.

I'm sure Mike at B3 could whip up some inserts to move the rockers back away from the valves enough to where the std rockers could be used instead of buying new ones.

The Crane gold and the E rockers are very close in length, as well as the Mancini/Harland's.
The Comp Ultra-Pro rockers fit the TF heads okay as well.