As someone who has been playing for a while and had many people start and stop during my play time, but also as someone who used a character level skip I got in a WoW expansion pre-order so that I could jump straight in with a friend I am for this idea as a whole. I love the Warframe world and story and would encourage anyone to give it a good go, but there is so much to get caught up with as each additional update comes out. It isn't mine or anyone else places to dictate to someone how they should experience or approach the game. For every person who wants to skip for laziness there is someone who wants to catch up to a friend to play again with the 5 hours a week they have available etc.
The biggest concern comes down to implementation. The obvious protections to make sure there is no gifting to someone in an unwanted capacity, the warnings about exactly what is being purchased and where it places you and then there is the price.
The cost of the pack should likely be the already existing cost of the Railjack purchase, the nercamech purchase and some additional cost to make sure a player has suitable modding available for the gear they are getting in the skip part of the pack (railjack, necramech, quest related rewards) as well as whatever else is added to ensure a playable experience. I would argue that the overall price shouldn't be higher or lower than the combined cost of all of the currently purchasable market items in the pack. People may feel that because it saves time that should affect the price, but again another persons time isn't the concern and market fairness should be.
On top of that, making sure that a pack for someone straight after Vors Prize doesn't cost the same as for someone who already has a Railjack for example needs to be a consideration as well. Could be tricky to implement if bundles don't already do this currently. If it doesn't work this way for bundles in general, it certainly needs to in this specific case (as this isn't a bundle for cost saving in the traditional sense).
As long as it works out to match the current situation in game, which is to say that nothing can be purchased for platinum that gives a gameplay advantage unobtainable to someone who doesn't pay platinum then I can only see this allowing more people to access more of the game. Anyone who doesn't see a massive influx of new players into the community, supporting the devs and getting to enjoy the game we all currently enjoy as a positive thing confuses me.
