One of the things you have to realize about DHS ToT is that it isn't just plopped down with a small footprint in the middle of whatever land it is now in at DCA....it has an grand aura...an anticipation build up that is quite unlike any other attraction...the dense/overgrown gardens you travel through complete with the misty/fog effects they use during the summer that creates an unsettling eeriness, the crippled fountains you walk by on the terrace with the overgrown vines growing on the broken lattace work...all while 40s music with the likes of Bunny Berigan, Glenn Miller (and my favorite from the queue) Vera Lynn play with that scratchy vinyl sound that just puts you in the right place and mindset as that tower looms over you. The build-up created with DHS's ToT is Imagineering at it's best!
The only two things I would ask for to improve the attraction is (as I mentioned before) DCA's shake before you drop or launch, which would leave you guessing on which way you're going, and a more seamless transition from the 5th Dimension into the elevator shaft (it's a little noticable because it locks into place rather harshly and the shaft isn't air conditioned so its a tad (and by tad I mean it hits you like a wall) more humid in the shaft than in the 5th Dimension.