A)
For what you had in mind it will... IF the price to pay for transfer is still that all lasers and portals get destroyed (which can be done automatically as soon as the receiver pushes the "accept planet"-button).

If you keep it that way, nothing on the tactic & strat front changes and passing planets gets a bit more comforable.

B)
If you also introduce this seemingly little change about lasers and portals staying intact, the changes to the game will be HUGE, probably the biggest change ever done in IC, bigger than morale and look how morale changed the game. Morale changed the game to specialization with some interessting and some dumb roles but no role as exciting as it was before specialization.

Swapping planets as you want inbetween players without any price and that's what we are really talking about when lasers and portals stay intact, is the mother of all incitement to specialisation and using every specialized advantage possible. And as some players have already noticed, we are not only talking about attacker/banker or building but also about exploration, sneaking into systems (small players), swapping, attacking... while in peace times the planets are parked with the player with the highest income bonus... and so on.
From a team perspective it is a challenge to orchestrate, from a player perspective it will become even more boring than now.

BUT since the implications are so high, the remaining player base will be probably busy for over a year to really think of all the new strategies possible and another one to finetune... and that might be good.

So you have the choice, A) is what you had in mind and makes one small aspect of the game more comfortable (btw: exactly one of the things I would rather make much more difficult).
Or you chose B) which will go into IC-history probably as the "hugest slight change ever". Since you aren't aware of the implications, I would advise not to do it or you are giving the direction into which IC is/should go completly out of hand.

It's really great that you (re-)introduced what was once (really long time ago) known as custom games and probably implemented with greater flexibility than it was in the past. It's such a great way to experiment or to just take a walk on the wild side to experience some change.

And as a matter of fact, the implications of moving planets while they stay fully defended by lasers and portals (and without regard of the NW of the receiver), are so interesting... heck, if Starstrike and me were still playing I'd see us exchanging page after page to crunch through the different possibilites. He'd probably agree with me that it isn't a change we would wish for in the long run but, as I said, for a walk on the wild side just to see what all is possible... highly thrilling.

If you want the game to continue in the direction of hyper-coordination, specialized roles, etc. then it would be a nice quality of life improvement - thats if you can make it so it doesnt open up new disruptive strategies or tactics.

However I would argue that this is patching a problem whose root cause is actually the existence of specialized roles(and hence, planet passing) in the first place. I have always been of the view that intra family coordination should be limited to attacks, politics, wars, etc. and should not be there for building/infrastructure.