Nathan,
Good luck! Proficiency testing is something of a pipe dream. Does driver's education prevent speeding or following too closely? No. Will every bowhunter that passes a proficiency test have the discipline to not take a 50- or 60-yard (meter) shot? No.
Is it appropriate to limit the freedom of a group off individuals because a small percentage will push the limits or use bad judgement? No.
You can ban any activity based on the concept that some participants may not use good judgement. In the end, all that happens is a restriction of individual freedoms that is stifling and reduces the overall quality of life.
Hopefully, your legislators will keep the issues in what I would call proper perspective in comparison to other legal activities where life, limb, or property may be impacted by an individual's decisions. For legislators to change, the general public must also understand what such limits on personal freedom mean.
I hope reason (my opinion) prevails and you are allowed the freedom to bowhunt. On a side note, very cool web page (link posted in profile)!
Mike