Oh good grief...
"All other creatures and objects are barred from passing through it." - 5e clause that doesn't exist in earlier editions
"Spells and other magical effects can’t extend through the dome or be cast through it." - Another 5e clause that doesn't exist in earlier editions
Yeah, they've created a 7th to 9th level spell in a third level slot.
Originally, the sphere of force was strong enough to keep out light objects and wind, but not strong enough to keep out hostile creatures, spell effects, missile weapons, ect.
I'd say some designer needs to be slapped with a tuna. Things like this just make DM's lives a living heck.
Yea, the spell as written is extremely problematic, but it doesn't say anything about a floor. Unfortunately there are only so many burrowing monsters. in 3.5(?) you had the "well the baddies pick it up & drop it in a trap pit they cover with several hundred pounds of rock/roll it down the mountain & it at least made it uncertain enough to not be open door>nova>lets take a long rest whenever there's no doom clock