"Grammar, spelling, punctuation need to be standardized with recognized bench marks. Otherwise if we all just decide to spell/punctuate how we damned well feel like, within a few generations it will be virtually impossible to decipher what someone else has written."
Those are probably benchmarks, but perhaps you've just been out tagging park furniture.
I also am dubious about your claim that language will decay to incomprehensibility within a few generations. English has changed pretty radically over the past six hundred years, but Chaucer (1343-1400) is just about readable in the original without a gloss to hand and Mallory (1405-1471) is straightforward in the original. Both of them were writing before English had much of an orthography, and their phonetic spellings are complicated for those reading today because of the Great Vowel Shift. So there has been immense change to the language since then (for example, Mallory was still using es rather than 's to mark possession, a vestige of Old English).
Nonetheless, I wouldn't say this was "virtually impossible to decipher":
And whan Syr Ector herde suche noyse and lyghte in the quyre of Joyous Garde, he alyght and put his hors from hym and came into the quyre; and there he saw men synge and wepe - and al they knewe Syr Ector, but he knewe not them. Than wente Syr Bors unto Syr Ector and told hym how there laye his brother Syr Launcelot, dede; and than Syr Ector threwe hys shelde, swerde, and helme from hym, and whan he behelde Syr Launcelottes vysage, he fyl down in a swoun.
"God knows English is hard enough to learn as it is because so much of it's grammatical structure/spelling isn't logical."
Indeed. For example, spelling the possessive form of pronouns presents particular difficulties.