Paul congrats - having tried to dip the toe into 5'er land a few times when it finally clicked for me was when I stopped trying to throw in the lower notes and basically started to play all my normal parts using the b string notes as my root notes i.e. using the G on the B string in l pace of the E string sort of thing and basically taking all my originals band stuff and moving it 'along and down' where possible to again us the B string. Once I switched my mindset as Visog said I feel that the 5 has actually opened up the fretboard.
I'd bought the 5 primarily for my originals band but actually use it exclusively now. My one other snippet of advice is play the 5 exclusively for a good month or so, don't go back the 4 string no matter how tempting - persevere with it and you'll not look back