It IS a big deal.
First MG Rx-78-2: Okawaran version. 1995 technology. Enough said.
Second MG Rx-78-2: Gundam ver. 1.5. Fancy new PG style legs with 1995 technology arms. Cool legs, but everything else is WRONG.
Third MG Rx-78-2: Perfect [sic] Gundam. Once again, enough said.
Fourth MG Rx-78-2: Project Pegasus. New arms, new legs, new mobility. 21st century technology.
It took Bandai ten years to make the right Rx-78-2. It IS a big deal. Ugly Zeta and CCA mechs can wait.
PS: If they can't get the Rx-78-2 right, there's no way in hell they would get the MG GM Sniper II or anything else right. Look at the MG GM Kai.