Ride it as is
You've been riding this bike for some time now. Just because it's a racing geometry frame does not mean you have to use it as a race bike. The only issue you might have is if you start doing very aggressive riding or stunts (e.g trials riding). As for upgrading the bars, wheelset and fork, that's more personal preference than anything. The upgrades you mention do seem very sensible. I'd do it and see if you're more comfortable on the longer rides. Another thing to consider is swapping out the stem. Racing bikes tend to have longer stems with little or no rise to them. This gives you that stretched out position in the cockpit so often associated with racing. If you want a more upright position, I'd consider a shorter stem with a more significant rise. Again, it's personal preference and may or may not be what you're looking to do with the bike.
Bob