Mantis Rogue vs Kobold Rogue

Under races class recommendation, the rogue mantis is never mentioned, why? the high starting dexterity ( 20 ), the natural armor, the extra movement rate and finally the ability to wield 4 light weapons all sound perfect for a rogue character. Why is it not recommended then for the mantis to be a rogue?
Wouldn't a 1st level mantis rogue be able to wield 4 daggers with its weapon finesse feat and unleash 4 sneak attacks with a +5 to hit dex bonus? ( and later even more attacks with two weapon fighting feats )
Can a 1st level kobold rogue attack with a dagger in each hand +his bite and deliver 3 sneak attacks?
Can mantises put anything at all in their armor slots ( like a robe ) later in the game or will the armor slot be forever empty?
Wouldn't a 1st level mantis rogue be able to wield 4 daggers with its weapon finesse feat and unleash 4 sneak attacks with a +5 to hit dex bonus? ( and later even more attacks with two weapon fighting feats )
Can a 1st level kobold rogue attack with a dagger in each hand +his bite and deliver 3 sneak attacks?
Can mantises put anything at all in their armor slots ( like a robe ) later in the game or will the armor slot be forever empty?