Alternative Rules (Draft)

you are definitely thinking in the right direction :) but your ideas have long been implemented in TE and, in my opinion, they are much better ;)

Play your TE and enjoy life. And start here to describe how Heroes 5 is cooler than Heroes 3. IMHO, these are practically different games (SoD and TE). I have absolutely no desire to argue about what is better, but SoD has its fans, and you don't need to jump into every topic with your TE. Regarding the rules, I'll say - it's unclear what's going on with joining - the rest is quite acceptable, although sometimes a little complicated (for example, in the case of the experience of Isra/Vidomina). In general, I'm in favor and agree to play according to these rules.
However, I suggest at least the following amendments - in any case, any spells can only be used if the hero has the corresponding wisdom and a GM of that level is built. This will first simplify the rules, and secondly, it will slightly limit explosions/TP/DD. And in general, it would really be good to simplify these rules somehow. Respect to the author for his efforts. ;)