It is balanced at the moment.
A 10k combat bond in solo, is worth, 10k
A 10k combat bond in open, is worth 10k
There you go, balanced. Everyone gets the same.
Why should others get more or less because you chose to slow yourself down ?
That is your choice and you are responsible for it, no one else.
Where are your wingmen to protect you by the way? You wanted the social interactions of open mode, be sociable and group up with wingmen so you can get bonds with less hassle.
Wingmen are part of the problem, in my tests they slow you down.