So they removed the stat limitations from multi-classing.
That is huge!
Makes a lot of combinations easy.
I don't think you quite understand how bad a Wizard with intelligence of 8 is, or a Warlock with charisma of 8, etc. etc. etc. Those limitations were there to protect players from their own stupidity...this change only offers them the rope to hang their characters with. Inappropriate multiclassing when you don't have a minimum stat requirement to make that multiclass level viable is a completely wasted level-up.
What you say is right but both Eldritch knight and Arcane Trickster are int based, and none of them have an INT prerequisite before accessing to the subclass. I honestly don't see much of a difference between multiclassing into wizard at third, or picking the wizardry subclass at third.
Only spells used to attack others needs stats, so maybe you can multiclass just to access buffs and utility spells? I guess.
As far as I know the community (at least the Reddit community) always homebrewed multiclass prerequisites away and asked Wotc to remove them. Some of them don't even make sense, like, IIRC you need to have 13 STR and 13 DES to multiclass into fighter, while a full armor full fighter usually have no DES at all.
