Undoubtedly this game has evolved since wars were introduced and has a massive following of war enthusiast. The way wars are decided and allocation of stars for attacks is in my opinion a bit 'simple' for such a successful strategic war game.
if this was changed and i will outline an example of how it could be achived below, it would create a playing field which disadvantages no one, but ultimately leads to the best team winning due to superior attack skills and organisation in the vast majoirty of wars.
what i would propose is that each base taken into war is given a 'degree of difficulty' (DOD) score to completely destroy. This would be based on its defensive capabilities alone. When clans select their roster to start a war, they could then be matched with clans of roughly the same aggregate DOD and where possible this should be from top to bottom, much the same as it is now.
so if we say a max defence/max heroes TH9 has a degree of difficulty of 90 points we can use that as a starting score for that base. If some defences are not max or walls, heroes etc, the score drops to say 85.25 as an example. A max TH8 could be worth 80 points and so on.
The next factor to then decide the actual score achieved for a successful attack depends on what the attacker brings to the attack. If a player brings 275 max troops space including clan castle reinforcements and 3 max heroes and 13 spell spaces, he would have a relatively low multiplier applied to determine the max score he could achieve for a perfect attack against the TH9 in the above example. Each troop for each level would have a base weight and these are all added up when the attacker decides what he is taking to the attack. Therefore an account owner gains no advantage by upgrading just one type of army for war, because they are judged on what they bring, not what they don't
to make things interesting, a TH11 could decide they want to improve their maximum potential score by bringing less troops, or spells or heroes into battle. For example, only take 225 troops plus CC to increase the multiplier a bit. An interface similar to the one currently used could indicate what the max score achievable is based on the proposed troop, spell and hero composition currently selected. If the attacker likes it, he proceeds to the attack, if not, he could change things around a bit, maybe take less troops (if feeling confident) or different troops which have a lower weight for war. In a sense every single attack performed is engineered to optimise what you believe can be achived with the lowest possible weight army composition.
only the best score against each base would count towards the overall war total score.
If players with low level troops attacks higher DOD bases (this would normally be TH's higher than themselves) they would have increased multipliers. Therefore the potential rewards for successful attacks would be attractive. This would also be a good strategy if you have spare attacks at the end of war, or are trying to chase down an opponents score.
other considerations, such as not getting the Town Hall, would mean scores could be halved or something like that, thereby placing similar emphasis on destrying the TH as current scoring system.
if an attack results in damage achieved of say 80%, then the score achieved for that attack would be 80% of the maximum, or 40% if the TH was not destroyed.
the chances of wars being tied would be remote. The advantage of lopsided bases would be gone, because both teams take similar overall DOD bases into war in the first place. If new defences are dropped during prep day, the value is added, because the score or DOD for each base is calculated immediately at the point war starts. Players could go to war with a hero upgrading, because this would increase their multiplier for attacks, because they are below max attack strength.
i also think this would reduce search times for wars, because it will be easier to match teams with similar defence capabilities, as the need to factor in offence in the search is negated by the scoring system.
sorry for rambling on, but i think wars could be so much more interesting and sophisticated and something like this would take it to a whole new level and would at the same time create a more level playing field for everyone, even the casual players.
the current system for looting outside of war and achieving trophies is not affected by this in anyway and could stay exactly as it is.