I hear you, I've tried it and it's not for me.
What I don't like:
-Eating out of floppy, half-melted plastic pouches. It just kills it for me. I also think it's more of a pain. Washing my pot after dinner (or not) has never been an issue. Wipe the walls, swish around some water, drink. Repeat. Get them leftovers!
-Plastic trash. I don't like buying ziplocks to dispose of after a single use. On a long trip, you could easily use 2-5 per day (I've done it and don't like it). For repackaging food when plastic is needed, I prefer grocery bags- cut off the excess, tie them shut. One bag can package two-three portions if cut up. If you don't get plastic bags yourself (I avoid them), get extras from someone who does (my mom). I also like paper for packaging (especially if you're going somewhere you can have fires- tinder after dinner!). On my last backpacking trip in Joshua Tree I packaged my food in envelopes folded from my son's old homework :) I used primarily paper for the whole JMT as well- it works fine. For GORP a ziplock is great; I've used the same 1 gallon bag for at least 6 months now. There's enough plastic in this world, I try my best not to generate more.
-Carrying around wet, food residue bags for days as trash.