Tweak wording

Author: andreubotella

css-overflow-4/Overview.bs

@@ -776,8 +776,9 @@ The 'line-clamp' property</h3>
 		container, and floats after it could not affect the outside of the
 		container. However, they would still have to affect following floats
 		inside the line-clamp container, since their position would be
-		observable via the [[CSSOM-VIEW]] APIs. This is what proved tricky to
-		implement.
+		observable via the [[CSSOM-VIEW]] APIs. Implementing that properly was
+		tricky enough that it didn't seem to be justified by the flexibility for
+		authors.
 	</div>
 
 	Line-clamp containers have a <dfn>clamp point</dfn>, which is one of the