From a balancing, and practicality standpoint (synergy can't be die hard lore accurate)
If Darman favorited his long range bowcaster, then 9 times out of 10 he would likely use it over the 17M in Sniper config this way he can quickly swap from range to cqc or mid range.
This is also going to be used over the 17M Sniper 9 times out of 10 since the bowcaster was recently buffed.
Adding onto this, Synergy is attempting to clean up entity bloat (with the introduction of the AFK system, and Emote wheels etc) and keeping 2 snipers on 1 character doesn't help this.
IF it came down to it, would you rather have the DC17M Sniper or the Bowcaster?
I should note for transparency that this is all my personal questions, not a reflection of the Development teams. We don't discuss server suggestions until post closure.
I'm merely asking as a Former Darman myself who was willing to lose the 17M Sniper for it, and someone who balances weapons on server.