I agree on the perfect sync thing. Maybe one percent of all the people who ever see it will ever now the difference, and less than that if it cut in a quick shot style. As for importing and exporting clips to work with I think the main thing is to get your setting set right. Export using 601 or RGB color settings and importing them back the same way. That way you can matdh cut with an effect shot and not see color shifts, Unless you want to use that as an effect. Hey anything is possible. as far as tips. every system will have its own quirks, get to know them and good luck.
A cut is a cut & a dissolve is a disolve, and not just anybody with a system is a pro.