Mass isn't actually the factor there, but bulk: bulk will usually top off long before your mass limit does. You should be able to see that the second slider at the bottom will be pushing redline in no time at all.
But "balance" is the least of the problems.
The 1.0 milestone fundamentally revolves around a missing transpiler that bounces serious error messages in some pawn infocards (especially for pawns using the Humanoid Alien Races framework), which one person mentioned they were working on but has since found other diversions in the meantime... most likely due to how infuriatingly difficult it is to write transpiler patches. ;-) (I'm sure they're continuing to work on it, of course. I'm just trying to say that it's not an immediate thing and requires some pretty advanced programming skill.)
Numerous mods are still unsupported and will throw very nasty errors when you try to use them with Combat Extended. While actual support is impossible on Combat Extended's part for everything, it does lack graceful fallbacks. Some of that comes in the form of commented-out code in the source, i.e., code that had to be removed to get the mod to compile at all, which needs to be restored and completed before the mod reaches 1.0 parity.
Finally, there are mechanical differences between the B18 and B19/1.0 versions; it's not just a matter of balance but a simple fact that the mod must actually redesign content to fit the new framework it now resides in. Penetration mechanics, ballistics, etc. all changed, for totally inexplicable reasons, on Ludeon's part. In other words, it's not simply imbalanced, but actually missing.
Ultimately, what's there is functional. But it's an alpha. Errors should be presumed to be one's own fault. If not one's own fault, fixing them is one's own responsibility. If fixing them can't be done on one's own end, one must either accept them as the nature of the universe, or wait. =)
But "balance" is the least of the problems.
The 1.0 milestone fundamentally revolves around a missing transpiler that bounces serious error messages in some pawn infocards (especially for pawns using the Humanoid Alien Races framework), which one person mentioned they were working on but has since found other diversions in the meantime... most likely due to how infuriatingly difficult it is to write transpiler patches. ;-) (I'm sure they're continuing to work on it, of course. I'm just trying to say that it's not an immediate thing and requires some pretty advanced programming skill.)
Numerous mods are still unsupported and will throw very nasty errors when you try to use them with Combat Extended. While actual support is impossible on Combat Extended's part for everything, it does lack graceful fallbacks. Some of that comes in the form of commented-out code in the source, i.e., code that had to be removed to get the mod to compile at all, which needs to be restored and completed before the mod reaches 1.0 parity.
Finally, there are mechanical differences between the B18 and B19/1.0 versions; it's not just a matter of balance but a simple fact that the mod must actually redesign content to fit the new framework it now resides in. Penetration mechanics, ballistics, etc. all changed, for totally inexplicable reasons, on Ludeon's part. In other words, it's not simply imbalanced, but actually missing.
Ultimately, what's there is functional. But it's an alpha. Errors should be presumed to be one's own fault. If not one's own fault, fixing them is one's own responsibility. If fixing them can't be done on one's own end, one must either accept them as the nature of the universe, or wait. =)