He's saying to make the game run smoother so that you can make encounters larger. I don't agree with this. Even when lag and bugs don't slow the combat down, it still takes a long time as is. There's no need to make encounters larger just so you can decrease the hp of goblins. Spells may not be as effective as they are in 5e, but that doesn't mean they're weak. I feel pretty powerful as a spell caster. I cast sleep to great effect and use other spells when appropriate.
Lowering hp and chance to hit doesn't seem like a good idea. Say your chances to hit are lower. You shoot a spell, it misses, you shoot again next turn, it one shots the goblins. Two turns to kill a gobbo. Same as if you hit twice against an enemy with slightly more hp.
