Move to a new house. Seriously, I say that as someone who's going on Week 7 of 'camping out' in our basement/garage (and having the entire family share our smallest and only remaining bathroom w/ my teenage daughter) while pretty much the entire main floor upstairs is being renovated. The wife is beyond tired of me reminding her every time she finds something new to complain about that this was almost entirely elective; she asked for this...

Or... I'd bite the bullet and bust open the slab. More mess and expense? Almost certainly, but mess is temporary and money will eventually get spent on booze & strippers anyway (or else just wasted), so might as well do it right the first time and enjoy it more later, as long as you still plan to live in the same house long enough to feel like the initial pain has been sufficiently amortized.

Part of our kitchen remodel involved moving a window, which in turn meant moving our electrical meter ~ which in turn necessitated upgrading our entire electric feed from the street to the house to meet the current code to get our permits signed off. Of course we could have just left the window where it was and avoided all the rest of the associated BS, but then we'd have to live w/ the half-assed remodel forever instead of getting it done the way we really wanted in the first place.

This is a new house for us, approximately two blocks from the old one. It is empty and we will live in the existing house until it is done. Thus, the logistical nightmare you describe is minimized.

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I'll be what I am
A solitary man

Do it right, or don't do it.

We are remodeling our kitchen, but the sink wouldn't fit where we want it because of the plumbing. The contractor could run the pipes outside the wall and they would still be hidden by the new cabinets, but I would know it's half assed, so we ripped out the wall to do it right.

Good thing too, cause they found, you guessed it, mold. ugh. A whole new problem. All the walls came tumbling down, but at least we know it's right and we don't have mold

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"When the power of love overcomes the love of power the world will know peace." Jimi Hendrix

I'd bust the floor and do it right. Probably not that much more expensive. A few hours of labor.

This!

Another vote for busting out the concrete and doing it right.

You will have to look at the platform and feel shamed by it if you don't...

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Proud member of the MSF (Maple Syrup Mafia)

Bust out a concrete eraser, move the drain, pour back the slab.
If your slab is post tensioned, do not cut the tenon.

Sledgehammer the slab. The concrete will break easier than you think. Cut the drain line, there will be a “P-trap” where the old drain was. Move the “P-trap” to the new location. Measure the distance and add a new chunk of PVC, I would use schedule 80 for strength. Use a coupler on either end of the new section. Put stone around the drainpipe after it’s glued and in place. Cover the stone with plastic. Then cover with concrete.

If you tile over the slab, easy done, just trowel out the thin set over the concrete and put down your tile.

Busting out the slab isn't a big deal at all. I trenched out maybe a 40' long, 16" wide trench in my basement for plumbing in a half day. Rented a walk behind concrete saw from HD which was cheap, had a helper with a shop vac sucking up the slurry behind me, and the cutting was done in under an hour. Busting up the rest with a sledge hammer was easy-peasy. The work needed in your project is much less labour intensive then that.

Do it right the first time. A step going up to your tub will look ridiculous.

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Long Chile was a silly place.

As others have said..
You can go to local HDepot and rent a Bosch electric jackhammer, comes with rental set of chisel attachments.
Runs off regular household current.
Not that hard or messy. Actually, you might find it kind of fun.
A quick search of youtube will probably bring up some good DIY videos.
Closing things back up with concrete patch is not hard either. Go for it!

I think you never regret doing things the right way when it comes to big projects like this. Either skip it entirely, or put the effort/money into it to do it correctly. In the end, I think the risk of problems that end up costing more to fix than the original project would have cost, is not worth it.