Similar ages indeed, telling about how well thought out and produced Heroquest was. Much like XCOM : UFO Defense remains a near perfect tactical game after near 20yrs, so does HQ. Better minis or graphics appear, yet all too often fail by comparison. And most of us started gaming on these; we use them as a tide mark and unfortunately, we remain right in that they were very engaging, thought provoking games. Something was definitely in the water a couple decades back.
And it falls to the 'modding' communities to improve and sustain the game they enjoy. Sites like Ye Olde Inn can attest to the success of that, and very impressive mods for XCOM have nearly turned the modern version into the original.
In keeping with this tradition, I posit my groups' take on the Knight :

We found all iterations offered had him slaying just standing there and when he cleared a room we decided against the setup. What we have kept is a thematic goal system, the knight works towards the Shield and obtains a natural bonus. Next, the plate mail for extra defence and enjoy another natural bonus. No extra die or roll tracking, just this = that. Whilst we didn't get the plate, the shield made him survive a couple of scraps just because he could ignore a wound. The group came to a gentleman's agreement the Knight won't use missile weapons, but hand throwing something is not beneath him (I think we drummed up small hand axes, even a wine bottle). Adding that in on his character card just became too wordy.
Ultimately it's about using that original roll attack/defend and not adding to it. So now my mate enjoyed 'ignoring' a wounding roll and aimed to defend against the others, or pensively deciding which Really Nasty Monster(tm) he should focus his shield's trick against during skirmishes.
I imagine when he gets plate, he'll be a good bulwark character for the party (Wizard, Elf, Dwarf Clansman, Knight)