All highlevel, highend gear chars rape. Some more the others, and some really do offer easier gameplay than others. Some are outrageously stupid (Finished and his panzerhorse, all highlevel archers, 10+ PT people), some only really stupid (lolstab of doom abusers).
And everyone thinks his stuff/build is not a problem, but the other guy's stuff/build is, so thomek will say 30+ agi chars (with 18 str to boot and heirloomed weapons) are fine, archers as a matter of course think nothing is broken about archery, horsemen "need" their panzerhorses because, imagine, unarmoured ones die easy, etc.... and tbh, none of it IS fine, imo.
Btw, playing as a highlevel is really easy. I'm not some expert manual blocker - but eg. with the last iteration of my polearmer - using a heirloomed long voulge (which is a 83 speed unbalanced weapon with 39c and 20p stab, but on the upside very long and breaks shields) and I remember at times killing crowds of people (mainly playing on siege, although I did have a 2:1 K/D on battle too) by just backpedal-spamming at level 27 when I had 17/18 stats. It was easy to play, period - even without tincan armour (with heraldric mail and stuff, you have the armour rating equal to a ninja with lamellar and scale gloves, except you have a helm and slightly more wpf penalty).
While I love the overall character customization part of CRPG, the "power level infinity plus one" stuff which we have now (which is btw not THAT much a function of gear, largely of levels actually) is honestly fairly shitty. How does this tie into siege v battle? Easy. When you die in siege to some automatic railgun archer or 0 wpf tincan crossbowman or onehitted by spam / hammers / whatever - which is what often happens to people who're not yet level xyz with "uber" equipment, you get to respawn and fight again, and you get rewards anyway.