Currently, you’re actually permitted to have up to 12 holes!
– You can have up to five holes for gripping purposes (one for each finger and one for the thumb, all for the same hand). Although you’re not required to use all five holes on every shot, you must be prepared to demonstrate that you can.
– You can have one hole for balance purposes (a weight hole), not to exceed one and a quarter inches (1 ¼) in diameter.
– You are allowed one vent hole for each finger and/or thumb hole, not to exceed ¼ in in diameter. A vent hole is any non-gripping hole that intersects with a gripping hole at any depth.
– You are allowed one mill hole for inspection purposes not to exceed 5/8 of an inch in diameter and 1/8 of an inch in depth.
Any hole not used for its intended purpose is considered a balance hole and would be a violation of the rule.
Under the proposed rule, only the balance hole is being eliminated.
Since you only use 2 holes, that's all you need. However, if you can demonstrate that you can actually use other holes, they would be available.