That paper is theoretical BS, not much to do with reality what comes to FLA's. Other type of batteries are not my interest.
Anyway the draw backs of paralled banks. Resistance in short, or the minor differences in resistance causes uneven loading cycles and premature failing. To avoid it you'd need totally independent banks and that would be fun.
From engineering point of view multiple banks might seem advantageuos, from technician view point they are a nightmare.
Now I'm of on holidays and will be sipping wine and having 4 hour dinners next two weeks and might be online with tablet time to time so my responses will be short. Provence, Camarque and Languedoc