Tab is terrible at conveying rythmic information, playing anything moderately complex is very hard unless you're already familiar with the material. And I'd say it's a very lossy format if it's reliant on out of band information like a recording to make sense.
Fingering is a problem that mostly goes away as you gain an innate sense of what sounds good versus economy of movement and the ability to mute. For music written on guitar, it's usually relatively easy to tell what position works best.
Every guitar is different, too. String gauges, pickups, resonant notes, action height and intonation all play into it, and most of those are subject to personal preferences.
Fingering is a problem that mostly goes away as you gain an innate sense of what sounds good versus economy of movement and the ability to mute. For music written on guitar, it's usually relatively easy to tell what position works best.
Every guitar is different, too. String gauges, pickups, resonant notes, action height and intonation all play into it, and most of those are subject to personal preferences.