The thing is that playing solo will usually just play like cod, as many teammates don’t seem capable of holding an objective for any reasonable amount of time. HOWEVER, if you can get at least one teammate that can buy you time, you can move back to the next objective *(if you know where it will go).
This way, when you do get pushed back, the whole team has a much higher chance of holding it effectively.
Personally I usually try to focus on putting up a rally to get people to bypass the “build area”.
I set up my Radio Operator squad with at least one engineer, and AT mines across the whole group. This way, I can go set up tank traps (which can be subtle, as the less likely it looks like a trap, the more likely they will drive right through.) and still be able to call in artillery to help the team in the process.
Then grab a shovel (especially when melee perk increases dig speed), trench 2 wide x 6-7 long/ wire structure. Put it pretty much in the open where they are likely to try to run across. Keep it away from buildings where they could get cover and turn to destroy it. This wire alone is enough usually to buy some time if you get pushed back.
After that, you can go about setting up sandbags and such, switch squads to engineers or MG squad to build nests (all of mine are equipped with AP mines as well so I can immediately lay mines in key locations).
*The suggestion I keep making about letting defenders know where all objectives will be is key for this. All are necessary because some areas just need more time to set up, so going back even 2 objectives is not unheard of. I know a lot of people would say I’m wasting my time and not helping my team, yet if they get there and my team is then able to bleed massive amounts of tickets, its worth it.
To Note: not many players have the strategic mindset to set defenses in advance, so I really don’t foresee entire teams running back to set up defenses, but at least enough to make the game winnable from that location.
To again circle back to the original topic, “Player’s combat enthusiasm”, getting beaten back from a couple objectives can break their morale a bit, but seeing a fully fortified objective, from which they hold a significantly higher chance of winning, (from what I have seen and heard), brings back a LOT of enthusiasm.