Have it fretted for sure. I’m a predominately fretless player, but if having frets fitted will make you play it more and, more importantly, keep it - do it. You’ll own a truly magnificent bass, that you like and if you do come to sell it, don’t worry, you won’t have wrecked the resale IMO. Buying instruments for their potential resale, whilst being a potential pension investment, etc, isn’t their raison d’être, they’re musical instruments and should be played. To have a Wal is a lovely thing and it deserves to serve you in the way you want.
Ooh, I almost forgot