EXPORTING TO MUSICXML FILES DOES NOT SEEM TO BE A RELIABLE WAY TO PORT ALL FINALE FILES TO DORICO PRO 5

I've used the export tool as recommended, but sometimes either the exporter or Dorico seems to mistake different staves on a system as being on separate system, and sometimes it omits staves from systems in parts of the document. It also sometimes msinterprets things like the relationship between notation and tabulature, especially when two are edited independently for the same instrument in Finale before the export. Also, many of the graphics tools in Dorico are difficult to manipulate even after following the tutorials. There appears to be more things you can do with Dorico but the way to do them is often counterintuitive--it's not very WYSIWYG. For instance, editing tabulature settings or tabulature notes/chords in the score is tricky, and even though many help topics mention tab, you can't find those tops by typing "tabulature" in the search box! I understand that many documents will have to be significantly edited after the fact, but it appears that the exporting process makes mistakes or that Dorico interprets the MusicXML differently than it's exported.