(Just noticed the thread dates but maybe my post will still give you some insight on what's on my reservist son's mind LOL)
Here is real world experience. I have two sons. Both wanted to be Officers of Marines. Both are Marines now but they have two very different stories to tell.
The youngest jumped first using the logic above. Join the reserves, graduate boot camp, go to college, apply for PLC and after acceptance do Jr's and Sr's. No reserve drilling. Graduate college and commission.
Looks good on paper and might have worked that way in a perfect world. Nobody ever dreamed that he would get mono his first semester and end up with less than a 2.0 GPA. No PLC and now he is a reserve Marine. OK no problem. So the plan is to stay in school, get the GPA up and he can still apply for PLC in a few semesters.
Not so fast. In his second semester his reserve unit tells him to prepare for an IA tour in Iraq. (Mortuary Affairs) This IA tour will begin before his second semester is over so he drops out of college. His reserve unit then decides they don't need him to IA after all. Now he is out of school with no job etc. (and I'm thanking God he didn't have to go to TQ and prepare the Angels for their journey)
He's a sharp kid, MOS 0656, Data Marine. His reserve unit XO offers him a job with XOs companie's IT dept making great money. Now he loves his job, they love him and he's a drilling reservist. A year later he gets his IA orders.
This network switch and router guy, who joined the Marines to be an officer, goes to Fallujah as a .50 cal gunner on an armored up Humvee. (He's loving this shit because he is a data geek behind a machine gun LOL.) He survives over 100 security missions outside the wire and comes home without a scratch. His platoon loses 4 KIA.
Now he is home, a proud Cpl of Marines. He enjoyed his IA tour. It looks like his old company wants him back enough to offer him a promotion and a lot more money. He'll take that but Afghanistan is on the horizon. It's been over 4 years and he hasn't applied for PLC yet.
My oldest son went to college, applied for PLC, went to OCS, finished college, got his eyes cut, waver approved for SNA and commissioned. He's now at TBS with Mike Co waiting for a slot with Charlie so he can begin living the dream in P'cola.
Real world not theory.