Why was the MP5 cut from HL2?

[RealP27G]

In the Half-Life 2 beta, there is a weapon called SMG1, which is based on the MP5K (K for Kurz, meaning "short"), itself a more compact variant of the MP5 which appears in Half-Life 1. It and the SMG2 (based on the MP7) were cut from the game in favor of the SMG in the final version, which resembles the MP7, albeit with a grenade launcher under the barrel. Was it cut due to its cartridge (9x18mm) being the same as the Pistol's? (USP Match)

P.S. This was the case for the SMG in Half-Life 1. Both the Pistol and SMG had the same type of ammo. If you ran out of reserve ammo on either weapon, the other would have none as well.

[Shift]

"In Half-Life, it was a model built around the MP5sd, which is the silenced version, which is funny because it wasn’t silent in the game. That was always something that drove me crazy, but people just didn't like it silenced." For Half-Life 2, Ted brought in the successor, the MP7. “It was brought to the market just recently. It is actually kind of a revolutionary gun. In the real world, it uses kind of a smaller caliber bullet than the MP5 does. This one has a custom round that goes along with it, and we have further modified it to have it be more like its predecessor and have a small grenade launcher underneath it."
Ted Backman, Uncorrected Proof, page 327.

They wanted a fancier more futuristic gun, mp5 was in almost every game and movie of early 00s.