I'm using the pre-installed player on a Samsung SIII, no idea what player it is, but it works very well, except for the genres where somehow with some albums they get lost and I get that "ta".
Long track titles aren't a big issue, if I turn the phone (from vertical to horizontal) I get to see enough in the list and once I'm playing a track, the titles run through and I get them in their entirety.
What I can't see, alas, is the comment field (where sometimes I painstakingly add line-ups and other info), even though I can watch a listing of many (ten or so) fields while playing a track (I can switch between tracklist, cover-view or background info on the running track, and I can of course minimize it all and use the phone for something else like texting or browsing or reading kindle stuff).
Obviously I could have all the covers and txt-files on the phone, too, but the gallery of photos will display each of these as a folder and as that's a nuisance I deleted them all.
As for re-naming files, if ever I do that, I always put the track numbers in front. But usually they're just called "Track01" or I let iTunes do the work (M4A at highest quality) and it, too adds track numbers in front.