Not particularly IMO. It’s fair to count the summons as part of their total arsenal and abilities, but it’s not particularly impressive on the part of the user (depending on how it’s used). It’s not like Kakashi has any control over the speed and power of the summons, he just needs enough chakra to do it.
So Kakashi having the summons makes him stronger overall, but the fact that he had to call in assistance because his own physical abilities and ninjutsu weren’t enough speaks more highly of Zabuza IMO.
Imagine if you instead had the ability to summon more ninja allies to your side. Would you consider it a fair reading of Kakashi’s abilities if instead of dogs he summoned Asuma to fight Zabuza for him? Animal summons are pretty much the same thing.
A literal inanimate weapon is hardly the same as summoning another sentient being with their own strength and speed and skill.
All the summoning jutsu tells me is that Kakashi had enough chakra to do it… which really doesn’t mean much of anything in the context.