Since a large chunk of Artificer spells still do not exist on scrolls to inscribe - they should be able to swap spells much like the Sorcs or FVS can at the trainer for a fee with some time restrictions. So if you choose the incorrect spell at level up you can at least have a chance of resetting it to something useful to your playstyle.
Or place them at the vendors so they can be purchased and inscribed. As wizards can inscribe almost every spell (since it is the rare spell that isnt for sell) - if the artis are supposed to be in the same class then the arti spells need to be included so they can inscribe them - esp the level 5 and 6 since they are the ones you can not find at all in the shops and the cost for them on the AH is prohibitive because of the rarity of the drops (and there are still some that just dont exist on scroll at all).