I agree. With the 2C drugs, taking your dose in two parts spaced apart by an hour is an okay way to make the come up a little bit less intense without making the trip THAT much longer. With LSD however, I find you really just want to take all your acid all at once. Redoses don't seem to work so well with LSD for some reason. It just prolongs the experience without adding any more depth to it.
Just a side note I would like to add as well that I have noticed with LSD. This is an observation I made after tripping out at a music festival for several days in a row. I've gone to this music festival three times now, and each time it's like 4 or 5 days of binging on psychedelic drugs. But a lot of people I trip with and myself have noted how LSD must be the first trip we take at the festival. If I trip on other psychedelics for day 1&2, and then do LSD on day 3, the LSD hardly does anything at all...whereas if I do LSD on day 1, and then do 4-aco-dmt on day two, and then 2C-E on day three, I can have full on +++'s each time. LSD seems more sensitive to the tolerance your body has built up. For me anyways. I find the 2C drugs are very good at blasting through tolerance.
Another time, I did 20 mgs 2C-E and 5 hours into that trip took 20 mgs 4-aco-dmt. And then the next night took 25 mgs 2C-T-7 and noticed no decrease in strength of the T-7. Anyways, I will stop rambling now.