1. Those lower level players can easily create a more appropriate alliance for their age.
2. Its not throwing skill out the window. An alliance will face another alliance of similar glory level thus similar alliance composition. When 2 AA or near AA. or CA/AA alliances fight each other it will be about skill or p2w cards.
3. That already happens now. With better AXP benefits, those alliances may not do this so they dont lose their bonuses.
I have yet to see any other solution that will eliminate sandbagging in its entirety. There have been many other solutions to lower the rate of sandbagging though.
1. Okay, they do that. They're fairly good at the game, they go up in glory. Then they start losing to higher age teams. Those guys are less skilled in their attacks but they win just because they have played the game a bit longer or paid some money to speed up their progress. Such matches are obviously unsatisfactory (read: exactly the same like matches against sandbaggers, even worse because it will be guaranteed to happen). What do they do? Quit world wars? Start losing on purpose so they would get matches on equal footing in ages? I hope you see where this would go.
2. It actually is. And it would also be a huge pay to win mechanic, probably even worse than the stronghold is now. Imagine this picture: you're a top alliance, good AA bases, skilled players. Cold war age comes out. Who do you think would be the best now? Yes, the teams that forked out the money to speed up everything. Your team doesn't do that. Your team falls out of the rankings since you are disadvantaged for months, maybe more. Your skill can't compensate for stronger units and buildings, no matter what you do.
Before you say "Stronghold and troop cards are already pay to win" I know that. And that doesn't excuse glory matchmaking one bit. This would make another layer of pay to win on top of the current one. Glory matchmaking - horrible idea.
3. I shouldn't even have to compare the current situation with the situation that glory matchmaking would produce but here we go..
20 AA vs 5 IA, 7 EA, 4 GPA, 4 MA
That kind of match would be impossible with even the current flawed matchmaking system, but would be very easy to get with reseting glory in a new alliance.
Oh no, what will 20 AA players do without +3 alliance gate space against a team like above?
Sandbagger matches and matches against reset skilled teams are bad now yes, but this would be beyond that. Trolls would ruin the entire world war experience for anyone not in the top ages, like the above mentioned problems weren't enough on their own.
Here's a permanent (drastic) solution. Give everyone only one attack. And hand out a limited number of "second attempts" to give to players in every war for both teams that would only be available for the one base they attacked. Basically making it so every one player gets one base only to fight against. That would make sandbagging absolutely pointless and actually detrimental to your team. Tighter matchmaking would have to be done (less difference in offense/defense power) but it would work.
yemen to answer you in short. Alliance perks wouldn't matter since abusing the glory matchmaking system would be so powerfull that it wouldn't matter what perks you have. And current pay to win inequalities in skill won't excuse the glory matchmaking system that would make that rift even bigger.