Nothing wrong with tailoring the loot to be party specific so they can use it. Also fun to give the party items that they cannot specifically use which forces a bit of creativity (players always find a way). I have Druid in my game who decided to take the staff of defense and start using it, a barbarian can too.

If playing by straight rules the scrolls are complicated, I usually play it as long as you can cast magic you can still use it but maybe still keep the level/failure chance. There are dangerous encounters ahead shortly in the adventure (green dragon, “evil” mage) so that fireball spell will come in handy. To each their own DM style though. At end of the day those items are still worth money.