If you carefully parse the language at the end, "heavy capabilities" only means "we have some tanks" not "we have a heavy force". Similarly do not confuse "sustaining close combat manoeuvre expertise" with "we have close combat capabilities". What it means is that we can practice for close combat with what we have; something in the nature of how armies prior to WW2 were practicing close armoured combat with plywood tanks mounted on cars. It does not say we can actually do close combat in a high intensity conflict.
I guess the real question is are they fooling themselves or just trying to fool others? The phrase "versatility across the spectrum of missions" goes a bit far IMHO.
And just let me say as an aside, I do think that LAV 6.0s with Leopards and even the limited artillery and other CS enablers that we have do have some utility (like a BTR equipped Motor Rifle Battalion has - less the artillery) but just not at the high end.