8 jumps in your JumpaConda to Palin's base, transfer thruster module, fit to JumpaConda, have it modded by Palin, store it, 8j back to Jameson's (or wherever you prefer to live), transfer module back, fit to intended ship... Easy
People just can't be happy with anything. If FDev add something QoL improvement, some one come and tell you it's pointless, useless...
What you described takes 2,5 Hour: First not everyone have JumpaConda (I have 2 Conda, none of them exploration), but 8 jump to Palin ~15 min, transfer drive ~1 Hour, engineer then ~15 min back, call back your drive= another 1 Hour waiting. (btw it's easier if you put the engine on the Conda and fly with there and back)
With the new system, i buy my new Chieftain/Type 9, fly to Farseer, pin blueprint, fly to nearest Station remote engineer to G5 Dirty, fly back to Farseer for experimental, if really need (not for a trader). My ship is ready with G5 and happily flying to the next engineer or to my business, when you just en route back to home(or even just waiting for the module), and still an Hour to call back your module! But yes, I am sure it pointless. (and you really want to transfer a module to Palin and back? Seriously? That's 2 hour waiting from around Sol, even faster to go out with a low jump range ship)