Some big company do have policies that you need to wait 1 ~ 3 years before the GC proecssing.Using perm, LC will not be that long, but the priority date is important for your final 485 approval. Now you can see the PAI QI is long for EB2 and EB3. EB2 is much better than EB3. Try to clear with your boss and HR you can file EB2 first, then struggle with the start date. :-) Good luck.