[1] Yes they are many maintain that by increasing level caps over time and then more items, this game would not seem to be well suited to a power creep over time, or will it go the way of WT, that was once meant to be a WW2 based game that now has moved so far beyond that. What will happen here once those that race like mad to the cap, will we see CV's eventually because they are desperate to always be ahead of the curve.
[2] the danger is atm that the front line as you call it never achieves the desired result, if players cannot defend against the fleets you opt to attack ports with (and that is not throwing blame at you for using large strong fleets) they will not show up to fight no matter where you throw that line so you are left with pve grind and empty port battles, you are not bringing yourselves closer to pvp, willing pvp comes from parity of force, where both sides feel there is a chance to win.
[3] I doubt any casual player has pve's themselves into a Victory yet, solutions, well the devs could set a BR cap on port battles so yes you can bring a Victory but you then limit the overall numbers so a fleet of cerbs has a slim chance as defenders, deep water port battles are not 'end game' content you can go from Cerb onwards you seem to want to make them end game tho as fast as you can, alternatively you could reign it in a little and bring a force you know the opposition has a chance to match, yes you risk a loss now and then but the excitement might be better, but that comes down to what individuals see as better, map painters would tend to disagree.
[4] Don't be so sure, the USS has 160 members at one point and 50 logged in at prime time, now look, 11 went pirate and the rest are not seen, I only see a half dozen of them at port battles if that, two reasons come to mind, endless AI fleet battles and taking empty ports in the Bahamas. The USA as a whole are not in a good way. Britain got an influx of players, how long will interest remain when you are all fighting over what little scraps of pvp you can find, no nation is immune to that.
could not agree more