that's a nice rifle and a great action. Even thought Holland put their name to it, it's a pretty straight forward and basic styling. Nice clean wood, decent sights, looks good. Nothing would be lost IMHO in glamming it up a bit; however, you will never get a nice veining into the stock if it's not already there, sort of also defeating the glamming up purpose a bit, and secondly, the front tip if ebony for example, would have to hold the sling stud unless you were going to extend the stock length by 1/2 to 1". You don't want the sling stud in the tip as it will look odd and might not hold. you could not set the sling stud further back because the checkering runs so far up the stock.
One could put a nice re-oil finish on it, ebony grip and tip, and rust blue the barrelled action, but is the rifle worth another, say £600 investment, probably not...and it looks pretty good as it is IMHO.
If I was you I'd run the barrel until done, the consider building a custom rifle on the action and comissioning a real beautiful build that deserves all the fancy stuff.