I really do think Last Crusade should have been the end, but this one isn't terrible. I'll give it another watch on Blu Ray and see if I like it any better. I actually rewatched Kingdom of the Crystal Skull recently (probably only my third viewing in total) and actually I didn't mind it as much, even the aliens. But the chase in the forest with the sword fight etc has really dodgy CGI, and pales in comparison to the non-CGI thrills of the truck chase in Raiders.

And speaking of CGI, when held against the fabulous non-CGI train chase at the start of Last Crusade, the first section of Dial of Destiny really suffers in comparison.