I don't think an increase of 60 DP, as in the original post, would make a major difference. I usually play with virtually uncapped battle size though (max DP set to the thousands in config), and also use the
Fleet Size by DP mod. Oh, and
Himemiko's Java mod, otherwise the increased ship amounts will tank your fps.
The gradual deployment for your own ships and the enemy reinforcing in equal amounts to destroyed ships (causing a slow trickle of new ships, especially prevalent in larger multifleet battles) do not vibe for me. The rigidity of the player-side deployment and disorganized way of the AI's deployment also does not endear this system to me. If I have scavenged together a semi-capable battlefleet, l damn well want to use the entirety of it. Same goes for enemies, if I am outnumbered 4:1 and I did not pick the green "flee anyway" option, it's on me and I want all the enemy ships to spam their weapons, missiles and fighters on me.
Gameplay-wise I enjoy the drawn out battle lines and the increased amount of dakka. Though ordering around your fleet is sometimes a bit stringy due to the low amount of Command Points (relative to the increased amount of ships and the extended length of the battles). Hardened Subsystems is practically a must for any frigate, and SO ships don't cut it in huge fleet engagements, unless I cheese it with tactical retreats, which reset PPT for each separate engagement.
All in all, it's personal preference for me, I like it more this way. I'd say give it a go, see what DP limits you prefer.