I hope all familiars would be like that for all classes: with attacks and able to scout ahead and use their skills far beyond.
The reason being told before: there´s no "help" action nor ritual casting in BG so the familiar would be useless if it can´t help you nor attack nor you can recast the spell freely (familiars are very squishy)
They will become just a glorified "mage´s eye" that is also is a concentration spell ( you can only have one of those on at the same time usually)
A Familiar, when "near-ish" an enemy, could give a bonus To Hit for example or Advantage to hit.
But I understand that the Help Action is not in-game at the moment. All good.
I would though limit attack to within 100 feet of caster/owner.
As for gold to summon a new Familiar (after being destroyed), it is just a tiresome limit. A better limit would be one familiar re-summon per Long Rest.
