Perspective + battle mechanics are not the only thing that affects the whole of development! I would say that development time was almost certainly affected by it being a fully 3D game, which is something that Game Freak had never done before! (keep in mind, Pokemon Stadium,Colosseum and Battle Revolution were all handled by different developers)
They had to create models for buildings, characters and Pokemon (and they didn't skimp on this; as all Pokemon have updated, if not brand new, models) which is something they didn't have to do before, not to mention it's their first venture onto the 3DS as a system, which explains a lot of the weird frame delays in battles with a lot of models + slowdown in menus. Diamond and Pearl also similarly suffered from being the first games on the DS, as there was massive slowdown in battle speed due to damage calculations and how they hadn't really optimized the game that well.
Now, that doesn't EXCUSE any of the flaws but it certainly provides a different perspective as to the game's weird design quirks. I mean, there's plenty of games on the 3DS with more models, more complicated models on screen at once that don't suffer the same slowdown issues (Smash Bros and Monster Hunter, for example) and they could have delayed the game to iron out the kinks (I mean, the worldwide release may have made them have to rush the game as well!). But like... doesn't change my opinion on the game as a whole.
They had to create models for buildings, characters and Pokemon (and they didn't skimp on this; as all Pokemon have updated, if not brand new, models) which is something they didn't have to do before, not to mention it's their first venture onto the 3DS as a system, which explains a lot of the weird frame delays in battles with a lot of models + slowdown in menus. Diamond and Pearl also similarly suffered from being the first games on the DS, as there was massive slowdown in battle speed due to damage calculations and how they hadn't really optimized the game that well.
Now, that doesn't EXCUSE any of the flaws but it certainly provides a different perspective as to the game's weird design quirks. I mean, there's plenty of games on the 3DS with more models, more complicated models on screen at once that don't suffer the same slowdown issues (Smash Bros and Monster Hunter, for example) and they could have delayed the game to iron out the kinks (I mean, the worldwide release may have made them have to rush the game as well!). But like... doesn't change my opinion on the game as a whole.